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April 18, 2014

Search: Chem II - Equilibrium

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Chem II - Equilibrium
post yourwork, we will take a look.
Thursday, March 6, 2008 at 1:04pm by bobpursley

Chem II - Equilibrium
You were right to change the mols to molarity by mol/2.4 = M. H2 + I2 ==> 2HI Set up an ICE chart. initial: (H2) = 0.714/2.4 = (I2) = 0.984/2.4 = (HI) = 0.886/2.4 = Now do the reaction quotient = (HI)^2/(H2)(I2) = (0.369)^2/(0.2975)(0.410) = about 1.1 or so which means at ...
Monday, June 16, 2008 at 11:57pm by DrBob222

Chem II
PCl5 dissociates according to the reaction: PCl5(g) ↔ PCl3(g) + Cl2(g). One mole of PCl5 was placed in one liter of solution. When equilibrium was established, 0.5 mole of PCl5 remained in the mixture. What is the equilibrium constant for this reaction?
Wednesday, February 29, 2012 at 7:40pm by Sam

Chem II - Equilibrium
Assume any value for volume? 1.0 L is the easy way go go.
Monday, June 16, 2008 at 11:51pm by DrBob222

Chem II - Equilibrium
A 2.00 mol sample of nitrogen dioxide was placed in an 80.0L vessel. At 200 degrees C, the nigrogen dioxide was 6.0% decomposed according to the equation: 2NO2 in equilibrium 2NO + O2 Calculate the value of Kc for this reaction at 200 degrees C. I have worked through this ...
Thursday, March 6, 2008 at 1:04pm by Ken

Chem II
I'm not exactly sure of what you want but I can give you a start, perhaps. This is a redox reaction. The beginning concns are too high on the right; therefore, the reaction must shift to the left to reach equilibrium. [You can show this by Qp = 0.115/0.215 = 0.534 and this is ...
Tuesday, October 2, 2012 at 10:02pm by DrBob222

Chem II - Equilibrium
This is just a rerun of the CO2 and NO problem. You must change grams to mols and that to Molarity. You already have mols for SO2.
Tuesday, June 17, 2008 at 12:12am by DrBob222

Chem II - Equilibrium
3.9 moles of NO and 0.88 moles of CO2 are allowed to react as NO + CO2 <--> NO2 + CO At equilibrium 0.11 moles of CO2 was present. Kc for the reaction is _____ 0.27 1.7 3.14 6.03 Don't you need to know how many liters, to figure Kc don't you have to change everything to ...
Monday, June 16, 2008 at 11:51pm by Ken

Chem II
2 NOCl(g) --> 2 NO(g) + Cl2(g) Let’s assume that at a given temperature the equilibrium constant is 2.25: Also, the equilibrium concentration of the NOCl is 0.04M. Determine the concentration of the NO and the Cl2 CLUE: the concentration of both of the products must be ...
Wednesday, May 11, 2011 at 7:56am by Sarah

Chemistry
As for chem I vs chem II, I think you are expected to know the material from I going into II. And this is another of the problems with the test. How many profs around the country start and stop the semester with the same number of topics and to the same depth?
Thursday, April 19, 2012 at 8:27pm by DrBob222

Chemistry
A mixture containing 0.5 mol of H2 (g) and 0.5 mol of I2 (g) was introduced into a 10L container at a temperature of 448 C. At this temperature the equilibrium constant Kp is 50. i. What is the total pressure in the container before the reaction starts and at equilibrium. ii. ...
Wednesday, December 26, 2012 at 7:24pm by Matt

Chemistry
A mixture containing 0.5 mol of H2 (g) and 0.5 mol of I2 (g) was introduced into a 10L container at a temperature of 448 C. At this temperature the equilibrium constant Kp is 50. i. What is the total pressure in the container before the reaction starts and at equilibrium. ii. ...
Wednesday, December 26, 2012 at 7:25pm by Matt

science
Which of the following properties increase with increasing atomic number for fluorine and chlorine? I. melting point of the elements (yes) II. boiling point of the hydrogen halides A) I only B) II only C) Both I and II D) neither I nor II I think it's A - is that right?
Saturday, January 1, 2011 at 6:07pm by i love chem

Gen Chem II
Thanks for the information Dr. Bob. Would you be able to work it out so that I can actually see the steps with the numbers and follow from there. The question was on Vitamin K from Sunday at 2:44pm which you answered at 3:45pm. Thanks again. I am looking to get a tutor since I...
Monday, February 11, 2013 at 5:28pm by Nefret

Chem
What is the equilibrium constant expression for the predominant equilibrium in HPO4^2- (aq)?
Wednesday, December 15, 2010 at 8:27pm by Liz

chem!
You work with the following system: 2X(g) <---> Y(g) At, equilibrium, [Y]=3[X]. If K=10, calculate the [Y] at equilibrium.
Sunday, April 21, 2013 at 7:34pm by scilover

Chem II - Equilibrium
For the reaction at 430 degree C, H2 + I2 <=> 2HI Kc = 54.3. Initially 0.714 moles of H2 and 0.984 miles of I2 and 0.886 moles of HI are placed in a 2.40 L vessel. The equilibrium concentration of H2 and I2 are _____. Ok, I tried this by changing the moles to M by ...
Monday, June 16, 2008 at 11:57pm by Ken

PLEASE HELP CHEM!!
You work with the following system: 2X(g) <---> Y(g) At, equilibrium, [Y]=3[X]. If K=10, calculate the [Y] at equilibrium.
Tuesday, April 23, 2013 at 11:23pm by scilover

HARD CHEM QUESTION- any help appreciated
Have you ever heard of ICE charts? http://www.chem.purdue.edu/gchelp/howtosolveit/Equilibrium/ICEchart.htm
Monday, May 13, 2013 at 8:48pm by bobpursley

chem help!
The equilibrium constant, Kc, for the equilibrium N2O4(g)←→2NO2(g) is 4.6×10−3 . If the equilibrium mixture contains 5.0×10−2M NO2, what is the concentration of N2O4?
Sunday, July 28, 2013 at 10:32pm by Anonymous

Chemistry
The following equilibrium was studied by analyzing the equilibrium mixture for the amount of H2S produced. Sb2S3(solid)+3H2(gas)<=>2Sb(solid)+3H2S(solid) A vessel whose volume is 2.5L is filled with 0.0100 mole of antimony(III)Sulfide, Sb2S3, and 0.0100 mole H2. After ...
Sunday, April 1, 2012 at 12:24pm by Laffy Taffy

Chem II - Equilibrium
This one may may a little more sense. I tried to write the equation DOWN to control spacing. The ICE stands for initial, change, equilibrium. There are three columns, one for I, one for C, and one for E. 2 mol/80 L = 0.025 M equn   I   C     E 2NO2   0.025...
Thursday, March 6, 2008 at 1:04pm by DrBob222

chem
The following reaction is used in some self-contained breathing devices as a source of O2. 4KO2(s) + 2C02(g)---> 2K2CO3(s) + 3O2(g) Suppose that a sample of CO2(g) is added to an evacuated flask containing KO2(s) and equilibrium is established. The equilibrium partial ...
Thursday, April 2, 2009 at 12:18pm by tomi

chem
this question is also based on the reaction above. The concentration of I2(g) is increased to 1.5 M, disrupting equilibrium. Calculate the new ratio of products to reactants with this higher concentration of iodine. Assume that the reaction has not yet regained equilibrium. ...
Wednesday, November 14, 2012 at 3:24pm by byke

Chem II - Equilibrium
Still confused, I have two concentrations for CO2 and none for NO2. If I change everything I have to M, how can I sub into the Kc formula without knowing the conc. of NO2 or haveing Kc?
Monday, June 16, 2008 at 11:51pm by Ken

Chem II
For the reaction H2+I2, Kc=55.3 at 700K. In a 2. L flask containing an equilibrium mixture of three gases, there are .056g H2 and 4.36 g I2. What is the mass of the I2 in the flask?
Monday, January 31, 2011 at 12:11pm by Jeff

Chemistry
I understand what is going on. You are lost, and do not understand Ka or equilibrium. Start here: http://library.thinkquest.org/C006669/data/Chem/equilibrium/ka.html
Tuesday, April 7, 2009 at 9:04pm by bobpursley

chem
http://www.rpi.edu/dept/chem-eng/Biotech-Environ/EQUILIBRIUM/logconc.htm Click on the link at the bottom "explanation of why the lines are linear".
Wednesday, July 4, 2012 at 4:19pm by DrBob222

chem
PCL5=PCl3+Cl2 a. Initially 0.72 mole PCl5 are placed in 1.50 L flask. At equilibrium, there is 0.16 mole PCl3 in the flask. What is the equilibrium concentration of the PCl5? b. What is the equilibrium concentration of the Cl2? c.What is the equilibrium constant for the ...
Monday, November 19, 2012 at 1:44pm by chemdummy79

chem
a.) At equilibrium, the molar concentrations for reactants and products are found to be [I2] = 0.50 M,[Cl2] = 0.60 M, and [ICl] = 5.0 M. What is the equilibrium constant (Kc) for this reaction? b.) The concentration of I2 is increased to 1.5 M, disrupting equilibrium. ...
Monday, November 19, 2012 at 12:26pm by Tracy

Chem II
Would either of the following reactions go almost completely to product at equilibrium? a)2NO + 2H2 at equil N2 + 2H2O Kc = 6.5 x 10 113 b)COCl at equil CO + Cl Kc = 3.6 x 10 -16 How do you figure this out?
Thursday, March 6, 2008 at 5:47pm by Ken

Chem
Nevermind! I found the answer...but cam you still help with this question: how does a system at equilibrium respond to a stress and what factors are considered to be stresses on an equilibrium system?
Monday, March 8, 2010 at 12:14am by Saul

chem
what will happen to bromothymol blue indicator: a.) after addition of HCl, how does it affects the equilibrium b.) after addition of NaOH, hoe does it affect the equilibrium c.) after re-addition of NaOH Rewrite the net equation for the equilibrium? is this an exothermic ...
Monday, November 26, 2012 at 11:27am by kacey12

Chem
At equilibrium, the forward and reverse reactions are still happening, but they are equal in both directions. The NET reaction rate (forward - backward) has to be zero at equilibrium.
Saturday, March 10, 2012 at 7:56am by drwls

chem
When the concentration of I2 is increased to 1.5 M, the ratio of products to reactants is 28. The equilibrium constant for the reaction is 83. In which direction will the reaction shift to regain equilibrium?
Monday, November 19, 2012 at 4:55pm by tracy

Chem II
The equilibrium constant of a reaction is 12.6. If the rate constant of the reverse reaction is 5.1 x 10 -2 the rate constant for the forward reaction is _____ 0.32 0.16 0.64 0.08 I don't even know where to start on this question. Any direction will help
Monday, June 16, 2008 at 9:57pm by Ken

PLEASE HELP Chem
1. A. equilibrium shifts to reactants agreed B. equilibrium shifts to products agreed C. equilibrium shifts to reactants agreed D. equilibrium shifts to products Reactants? 2. A. equilibrium shifts to reactants No B. equilibrium shifts to products No C. equilibrium shifts to ...
Tuesday, December 7, 2010 at 9:05am by Dr Russ

equilbrium II
when CO2 (.15mol) and H2 (.302g) in a 500L vessel at 576'C are allowed to come to equilibrium the mixture contains .000183 mol/L of H20. what is the equilibrium concentration of CO? CO2 + H2 --> <-- CO +H2O The equilibrium concentration of H2O = the equilibrium ...
Tuesday, April 10, 2007 at 1:35pm by christine

chem
Given the concentrations, calculate the equilibrium constant for this reaction: I2(g) + Cl2(g)---> 2ICl(g) At equilibrium, the molar concentrations for reactants and products are found to be I2 = 0.50M, Cl2 = 0.60M, and ICl = 5.0M. What is the equilibrium constant (Kc) for ...
Wednesday, November 14, 2012 at 3:24pm by byke

AP Chemistry
For the system 2SO2(g) + O2(g) <--> 2SO3 (g), change in enthalpy is negative for the production of SO3. At a particular temperature, 8.00 moles of sulfur dioxide and 10.00 moles of sulfur trioxide are introduced into a 2.00 L container. The system is allowed to reach ...
Saturday, January 12, 2008 at 10:45pm by S

ap chem
At a certain temperature, the equilibrium constant Kc is 0.154 for the reaction 2 SO2(g) + O2(g) *) 2 SO3(g) What concentration of SO3 would be in equilibrium with 0.250moles of SO2 and 0.578 moles of O2 in a 1.00 liter container at this temperature? Note: These latter moles ...
Sunday, February 13, 2011 at 6:39pm by Anonymous

HARD CHEM QUESTION- any help appreciated
Phosgene (COCl2) is a poisonous gas that dissociates at high temperature into two other poisonous gases, carbon monoxide and chlorine with equilibrium constant Kp = 0.0041 at 600 K. Find the equilibrium composition of the system after 0.124 atm of COCl2 is allowed to reach ...
Monday, May 13, 2013 at 8:48pm by scilover

Chem
At 850 C, the equilibrium constant Kp for the reaction: C(s)+CO2(g) >< 2CO(g) has a value of 10.7. If the total pressure in the system at equilibrium is 1.000 atm, what is the partial pressure of carbon monoxide.
Wednesday, April 22, 2009 at 2:01pm by Noemi

chem
what color change happen when water is added to bromothymol blue indicator: a.) after addition of HCl, how does it affects the equilibrium b.) after addition of NaOH, how does it affect the equilibrium c.) after re-addition of NaOH Rewrite the net equation for the equilibrium...
Monday, November 26, 2012 at 1:53pm by kacey12

college chem
two reactants are copper(II)chloride and water what change would you observe in the copper(II)oxide. was there a change in solubility? where is the copper(II) chloride? how can you tell
Sunday, October 9, 2011 at 12:21pm by dianne

AP CHEMISTRY
C(s) + H2O(g) ⇌ CO(g) + H2 ΔH>0 For the system above at equilibrium, which changes will increase the amount of H2(g)? I. Adding C(s) II. Increasing the volume of the container III. Increasing the temperature The answer is II and III. I understand everything ...
Friday, March 29, 2013 at 12:57am by Ash

chem
Earlier I asked does the following represent an equilibrium situation: 1) A glass of iced tea still has sugar at the bottom after several minutes of stirring. If no more sugar can be dissolved could you explain why that represents an equilibrium? Please
Friday, January 13, 2012 at 5:16pm by maria

AP Chem
A and C are right. Removing 1/2 CaCO3 won't affect the equilibrium AS LONG AS there is a smidgen of CaCO3 solid present. A speck must be present to attain equilibrium; more or less than that has no effect.
Tuesday, February 26, 2013 at 1:31pm by DrBob222

Chem 1046
a) dG = -RTlnK b) dG at equilibrium is zero c) I suppose c means immediately after those conditions are used and before it re-establishes equilibrium. Substitute the values, solve for Qsp and recalculate dG.
Monday, July 9, 2012 at 2:15pm by DrBob222

chem!
A 2.80 mol/L solution of iron (II) dichromate is combined with 5.00L of a 2.25 mol/L acidic solution of tin (II) bromide. Calculate the volume of iron (II) dichromate required. FeCr2O7 + SnBr2 --> SnCr2O7 + FeBr2 Is this the right formula? or no?
Wednesday, May 16, 2007 at 5:34pm by Mistra

AP Chem
The following reaction has Kp = 109 at 25°C. 2 NO(g) + Br2(g) 2 NOBr(g) If the equilibrium partial pressure of Br2 is 0.0159 atm and the equilibrium partial pressure of NOBr is 0.0768 atm, calculate the partial pressure of NO at equilibrium.
Sunday, January 8, 2012 at 6:24pm by Bill

Chem/math question - from Sam
For the following reaction at 600. K, the equilibrium constant, Kp, is 11.5. PCl5(g) = PCl3(g) + Cl2(g) Suppose that 2.510 g of PCl5 is placed in an evacuated 470. mL bulb, which is then heated to 600. K. (a) What would be the pressure of PCl5 if it did not dissociate? ___atm...
Thursday, January 15, 2009 at 8:43pm by Writeacher

Chemistry
Need help in AP chemistry on Equilibrium When heated, hydrogen sulfide gas decomposes according to the equation 2 H2S(g) ⇄ 2 H2(g) + S2(g) A 3.40 g sample of H2S(g) is introduced into an evacuated rigid 1.25 L container. The sealed container is heated to 483 K, and 3.72 ...
Monday, April 9, 2012 at 8:58pm by Sam

chem
Reaction H2 +I2 yields 2HI All three gases are initially at 0.1atm/ upon reaching equilibrium it is found that H2 pressure droped by 55% what is the equilibrium constant for this reaction.
Sunday, December 26, 2010 at 6:07pm by Anonymous

please help w/ chem hw
An equilibrium mixture at 225∘C contains 8.0×10−2M NH3 and 0.20M H2 for the reaction 3H2(g)+N2(g)←→2NH3(g) If the Kc at this temperature is 1.7×102, what is the equilibrium concentration of N2?
Sunday, July 28, 2013 at 10:33pm by Anonymous

chemistry
Lead ii nitrate was added to a small test tube as well as Sodium hydroxide. What is the equilibrium equation for the reaction of lead ii ions and hydroxide ions?
Thursday, March 31, 2011 at 8:25pm by Keli

chem
At a certain temperature, the reaction CO(g) + 2H2(g) <===> CH3OH(g) has Kc = 0.500. If a reaction mixture at equilibrium contains 0.00436 M CH3OH and 0.220 M H2, what is the equilibrium concentration of CO? The answer is 0.280 M. I dont know how to get it.
Wednesday, April 27, 2011 at 9:33pm by chris

Chem question Redox Stoichiometry
A 2.80 mol/L solution of iron (II) dichromate is combined with 5.00L of a 2.25 mol/L acidic solution of tin (II) bromide. Calculate the volume of iron (II) dichromate required. FeCr2O7 + SnBr2 --> SnCr2O7 + FeBr2 Is this the right formula? or no?
Wednesday, May 16, 2007 at 4:41pm by Mistra

chem
I'm stuck on this one aswell... 50.0 ml of a 0.0500 M solution of lead (II) nitrate is mixed with 40.0 ml of a 0.200 M solution of sodium iodate at 25°C. Calculate the Pb2+ and IO3- concentrations when the mixture comes to equilibrium. At this temperature the Ksp for lead (II...
Wednesday, May 2, 2007 at 5:41pm by Ilene

Chem
The brown color associated with photochemical smog is due to NO2(g). This is involved with the following equilibrium in the atmosphere: 2 NO2(g) <===> N2O4. Predict the signs of the enthalpy and entropy changes for this reaction. If the equation is at equilibrium should ...
Sunday, March 30, 2008 at 6:25pm by Ginger

Chemistry
http://www.chem.purdue.edu/gchelp/howtosolveit/equilibrium/Reaction_Quotient.htm
Sunday, October 31, 2010 at 7:36pm by TutorCat

Chem
At equilibrium, the concentrations in this system were found to be [N2]=[O2]=0.200 M and [NO]=0.500 M. N2(g) + 02(g) <-> 2NO(g) If more NO is added, bringing its concentration to 0.800 M, what will the final concentration of NO be after equilibrium is re-established?
Sunday, March 3, 2013 at 6:16pm by TK

Chemistry II
The equlibrium constant Kc for the reaction: has the value of 4.00 at 500K. If a mixture of 1.00 mol CO and 1.00 mol H2O is allowed to reach equilibrium at this temperature in a 1.00L flask, calculate the equilibrium concentrations of each species in the flask.
Sunday, April 11, 2010 at 6:11pm by curtis

HARD CHEM QUESTION
This makes no sense to me. Reaction quotients are determined by substituting non-equilibrium concns. With a Keq of 4.2E-6 (I assume that is what you meant) we can calculate the equilibrium concns of the three species. I don't see any numbers with which to calculate Qrxn.
Sunday, April 21, 2013 at 7:35pm by DrBob222

Chem
Estimate the equilibrium constant for the weak base (CH3)2NH, if a 1.59×10-2 M aqueous solution of (CH3)2NH has a pOH 2.58 (make an exact calculation assuming that initial concentration is not equal to the equilibrium concentration). (CH3)2NH + H2O = (CH3)2NH2+ + OH- I know ...
Friday, October 22, 2010 at 6:33pm by Kyo

Chem
Add the columns so that initial column + change column = equilibrium column. Equilibrium: CO = 0.145-x H2O = 0.145-x CO2 = x H2 = x Now substitute those values into your Kc expression and solve for x.
Sunday, March 21, 2010 at 8:00pm by DrBob222

AP CHEM
Kc = 1.87 10-3 for the following reaction. PH3BCl3(s)=>PH3(g) + BCl3(g) (a) Calculate the equilibrium concentrations of PH3 and BCl3 if a solid sample of PH3BCl3 is placed in a closed vessel and decomposes until equilibrium is reached. (b) If the flask has a volume of 0.400...
Saturday, February 7, 2009 at 12:13am by Ashley

chem
HIn ==> H^+ + In^- Addition of HCl increases H^+ and shifts the equilibrium to the left. Addition of NaOH decreases H^+ (due t5o H^+ + OH^- ==> H2O) and shifts the equilibrium to the right.
Monday, November 26, 2012 at 11:27am by DrBob222

chem
A flask is charged with 1.596 atm of N2O4(g) and 1.008 atm of NO2(g) at 25°C, and the following equilibrium is achieved. N2O4(g)-> 2 NO2(g) After equilibrium is reached, the partial pressure of NO2 is 0.504 atm. (a) What is the equilibrium partial pressure of N2O4? for this...
Tuesday, February 19, 2013 at 4:55pm by Hannah

CHemiStry!
Select all ionic compounds in which the number of anions present is two. carbon dioxide X manganese(II) hydroxide mercury(II) carbonate X mercury(II) phosphate ammonia sulfur dioxide Hello, I know manganese(II) hydroxide mercury(II) phosphate both have two anions, however I am...
Friday, May 7, 2010 at 8:50pm by ChEm

Gen Chem
Consider the reaction: 2 SO2(g) + O2(g) ↔ 2 SO3(g). If, at equilibrium at a certain temperature, [SO2] = 1.50 M, [O2] = 0.120 M, and [SO3] = 1.25 M, what is the value of the equilibrium constant?
Wednesday, February 29, 2012 at 7:38pm by jon

chem
1) Does a fire burning in a fireplace represent an equilibrium situation? Why or why not? 2) Does the following represent a equilibrium situation? Liquid mercury and mercury vapour are found in a thermometer.
Monday, January 9, 2012 at 6:32pm by maria

Chem
Enough SO3 is added to an evacuated container so its initial pressure is 4.00 atm. Calculate the mole fraction of O2 in the equilibrium mixture if the total pressure at equilibrium is 5.00 atm.
Wednesday, January 26, 2011 at 9:47pm by Frank

Chem.
At equilibrium, the concentrations in this system were found to be [N2]=[O2]=0.200 M and [NO]=0.500 M. N2 + O2= 2NO If more NO is added, bringing its concentration to 0.800 M, what will the final concentration of NO be after equilibrium is re-established?
Tuesday, April 1, 2014 at 12:59am by B

chem
Consider the following chemical equilibrium: SO3(g) --> SO2(g) + 1/2 O2(g) and Delta H = 98.9J i. adding oxygen gas ii. compressing the system at constant temperature iii. adding argon gas iv. removing sulfur dioxide gas v. decreasing the temperature Which of the above (i-v...
Sunday, March 9, 2008 at 4:44pm by Anonymous

Chem
Please tell me if these are right. 1.According to Le Chatelier’s principle, what is the effect on the products when N2 is added to the equilibrium mixture of each of the following reactions? a. 2NH3(g) < = > 3H2(g) + N2(g) B. N2(g) + O2(g) <= > 2NO(g) C. 2NO2(g)<...
Monday, December 6, 2010 at 2:58pm by Carrie

chem Help
At equilibrium, the concentrations in this system were found to be [N2]=[O2]=0.200 M and [NO]=0.500 M. N2 + O2= 2NO If more NO is added, bringing its concentration to 0.800 M, what will the final concentration of NO be after equilibrium is re-established?
Tuesday, April 1, 2014 at 11:57am by Anonymous

chem
What mass of ice at 0°C can be melted by the addition of 1670 joules of heat? When the temperature is decreased on the following system at equilibrium: 2 HCl(aq) + Mg(s) <--> MgCl2(aq) + H2(g) + heat a. In order to restore equilibrium, the reaction shifts left, toward ...
Thursday, April 5, 2012 at 12:22am by skye

chem??????????????????
YEs, it is the correct balanced equation bobpursley A 2.80 mol/L solution of iron (II) dichromate is combined with 5.00L of a 2.25 mol/L acidic solution of tin (II) bromide. Calculate the volume of iron (II) dichromate required. FeCr2O7 + SnBr2 --> SnCr2O7 + FeBr2 Is this ...
Wednesday, May 16, 2007 at 6:32pm by bobpursley

Chem 2
The following system is at equilibrium with [N2O4] = 0.55 M and [NO2] = 0.25 M. If an additional 0.10 M NO2 is added to the reaction mixture with no change in volume, what will be the new equilibrium concentration of N2O4? N2O4(g) 2 NO2(g)
Monday, March 5, 2012 at 7:58pm by Beth

Chem 2
What is the molar solubility of copper(II) carbonate at 25 oC in a solution that is 0.055 M in copper(II) chloride? I have done one and I am not sure I am doing it correct. If you can show your work for myself to understand. That would be awesome. Thank You!!
Sunday, October 30, 2011 at 6:20pm by Maegan G

PLEASE HELP CHEM!!
5.6 x 10-6 mol of A and 5 x 10-5 mol of B are mixed in a 200 mL flask. The system is represented by the equation: 2A(G) + B(G) <--> 3C(G) At equilibrium, there is 4.8 x 10-5 mol of B. Calculate the value of the equilibrium constant.
Sunday, April 21, 2013 at 7:33pm by scilover

gr 12 chem
Cu^+2 is paramagnetic and Zn^+2 is not. Think unpaired electrons in the 3d shell for Cu*II) and Zn(II).
Tuesday, March 30, 2010 at 4:44pm by DrBob222

chemistry
Concerning the following reaction at equilibrium: 3Fe(s) + 4H2O(g) Fe3O4(s) + 4H2(g), increasing the concentration of the Fe(s) would: Answer A. Shift the equilibrium to the right B. Shift the equilibrium to the left C. No change D. Increase the value of the equilibrium ...
Saturday, July 21, 2012 at 11:21pm by ken

Organic Chem
Which of the following alkenes do not show cis-trans isomerism? I) 2-methyl-2-hexene II) 1-chloro-1-butene III) 1-methylcyclohexene IV) 2-methyl-3-hexene a) I, II b) III, IV c) II, III, IV d) I, III
Sunday, February 3, 2008 at 7:27pm by Dawn

PLEASE HELP Chem
Please tell me if these are right. 1.According to Le Chatelier’s principle, what is the effect on the products when N2 is added to the equilibrium mixture of each of the following reactions? a. 2NH3(g) < = > 3H2(g) + N2(g) B. N2(g) + O2(g) <= > 2NO(g) C. 2NO2(g)<...
Tuesday, December 7, 2010 at 9:05am by Carrie

Chem 112
An equilibrium was established after 0.100 mol of hydrogen gas and 0.100mol of iodine gas were added to an empty 1.00L reaction vessel and heated to 700K. The color intensity of the mixture changed from deep purple to a lighter purple color. At equilibrium, concentration of ...
Friday, September 30, 2011 at 8:33am by Dominique

Chemistry
Which of the following systems would be considered to be at equilibrium: I. an open flask with 2.0 mL of perfume II. a closed flask with 10 mL of water III. an open flask with 10 mL of water IV. a closed flask with an ice cube and 10 mL of water a. I d. b. I and II c.II and IV...
Friday, March 12, 2010 at 7:57pm by Mario

gen chem
At 2273K, equilibrium constant for the reaction 2NO(g)<->N2(g)+O2(g) Kc=2.4x10^3 What would be equilibrim concentration of N2, if initial concentration of NO was 0.1160M?
Sunday, May 9, 2010 at 3:42pm by Chem

Chemistry
Which of the following statements is a false statement concerning characteristics of chemical equilibrium? a. Equilibrium is dynamic. b. For a specific reaction at a specific temperature, the equilibrium state will be dependent of the direction of approach to equilibrium. c. ...
Thursday, November 18, 2010 at 5:22pm by Carla

chem
Introduced into a 1.50L container is 0.100mol PCl5(g). The flask is held at 227degreesC until equilibrium is established. What are the partial pressures and the total pressures of the gases in the flask at the equilibrium. PCl5(g)<-->PCl3(g)+Cl2(g) Can you give me the ...
Tuesday, April 19, 2011 at 3:31pm by elona

Chem II - Equilibrium
6.75 g of SO2Cl2 was placed in a 2.00L flask. At 648 K 0.0345 moles of SO2 was present. Kc for the reaction SO2Cl2 <=> SO2 + Cl2 is _____ 3.83 x 10 -2 4.71 x 10 -3 1.12 x 10 -2 6.12 x 10 -4 Ok, on this one, I think I am missing something. Don't I need Kc if I don't have ...
Tuesday, June 17, 2008 at 12:12am by Ken

chem - precipitation problems
When hydroge sulfide gas is passed through a solution of lead (II) nitrate, lead (II) sulfide precipitates out. Write a balanced equation for this reaction and calculate an average rate, in mol/s for the reaction from this data: 1) at 0 seconds, mass of lead (II) sulide is 0 g...
Tuesday, June 8, 2010 at 4:49pm by Capella

Chem
Methane and Hydrogen Sulfide react at 960 degree Celsius and come to the following equilibrium CH4(g)+2H2S(g) <-> CS2(g)+ 4H2(g) At Equilibrium the concentration measured as [Ch4]= 5.56M [H2s]= 11.12 [CS2]= 2.44M [H2] 1.76, A) Write the equilibrium constant expression ...
Monday, December 3, 2012 at 12:15am by Jason

Gen Chem
At elevated temperatures, solid silicon reacts with chlorine gas to form gaseous SiCl4. At some temperature, the equilibrium constant for this reaction is 0.30. If the reaction is started with 0.10 mol of SiCl4 in a one-liter flask, how much Cl2 will be present when ...
Wednesday, February 29, 2012 at 10:11pm by jon

Chem
I like the ICE chart and I learned to make ICE charts by volunteering to do this homework help. The I stands for initial, the C for change, and the E for equilibrium. It is a very good way to sum up a problem with initial, change, and equilibrium, and many teachers around the ...
Tuesday, February 19, 2013 at 5:15pm by DrBob222

Chemistry(the)
An optically active compound having molecular formula C6H12O6 is found in two isomeric forms (A) and (B) in nature. When (A) and (B) are dissolved in water they show the following equilibrium. (A) Equilibrium mixture (B) D = 1110 52.20 19.20 (i) What are such isomers called? (...
Tuesday, February 5, 2013 at 12:22pm by abhi

chem
Zn^2+(aq) + 2OH^-(aq) ----> Zn(OH)2(s) a) how the addition of HCl affects the equilibrium? my answer is it will shift to the right b) how the addition of a small amount of NaOh affects the equilibrium?my answer is it will shift to the left c) how the addition of a large ...
Monday, November 26, 2012 at 2:45pm by tracy

Chem
The equilibrium constant kc for the reaction N2(g)+ 3H(g)---2NH3(g) at 450C is 0.159. Calculate the equilibrium composition when 1.00 mol N2 is mixed with 3.00 mol H2 in a 2.00-L vessel. need help setting up the problem
Wednesday, April 14, 2010 at 5:23pm by Anna

Chem
Can someone explain how to do this problem? For the equilibrium reation below, 288g of liquid water and 448 g of carbon monoxide are placed in an 8.00 liter container and heated to 900 K. If the value of K_c for the reaction at 900 K is 1.56, what are the equilibrium ...
Tuesday, May 25, 2010 at 1:25pm by Anonymous

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