January 20, 2017

Search: Acetic acid is the active ingredient in vinegar. In a solution of acetic acid the following equilibrium is established: HC2H3O2

Number of results: 72,704

Need help with coming up with a extraction flow scheme for separating the compounds in this mixture: aniline, p-anisic acid, octanol, and NaCl Thanks!
September 17, 2013 by Fred

Zinc reacts with hydrochloric acid according to the reaction equation... Zn (s) + 2HCl (aq) ---> ZnCl2 (aq) + H2 (g) How many milliliters of 5.00 M HCl (aq) are required to react with 5.55 g of Zn (s)??
October 4, 2013 by Chelsea

What are the individual orders of the reactants involved in the oxidation of methylene blue by ascorbic acid? Rate of reaction= [MB+]^m * [H2A]^n * [HCl]^p What are m, n, and p?
November 26, 2013 by Liam

What are the formulas of the salts that precipitate when the reaction mixture (n-butyl alcohol, sodium bromide, water, and sulfuric acid) is cooled?
December 2, 2013 by Chris

When magnesium hydrogen carbonate reacts with sulfuric acid, would you consider that an exothermic reaction because it forms CO2 (gas)?
May 27, 2014 by Derek

3NaHCO3(s) + C6H8O7(s) = 3CO2(g) + 3H2O(l) + Na3C6H5O7(aq) Who is the limiting reactant if you had 100g each of sodium bicarbonate and citric acid?
November 13, 2014 by Anonymous

how many liters of gaseous hydrogen bromide at 97 degrees c and 0.953 atm will a chemist need if she wishes to prepare 3.50 L of 1.20 M hydrobromic acid?
November 17, 2014 by Anonymous

How many grams of calcium carbonate would it take to neutralize if i have 10ml 3 molar sulfuric acid? (can this be explained in detail?)
February 10, 2015 by william

describe how you can prepare 500cm of0.1m of standard hydrochloric acid from commercial concentrated HCL of density 1.18g/cm and percentage by 37%
March 13, 2015 by Anonymous

A normal salt is formed when all the hydrogen atoms in acid have been replaced by a metal.Give equation
September 7, 2015 by jack

What volume of 0.0495 M Ba(OH)2 is required to neutralize exactly 14.87 mL of 0.136 M H3PO4? Phosphoric acid contains three acidic hydrogens.
October 18, 2015 by Amy

what are ways to increase the solubility of SnF2 at constant temperature and pressure. I think adding a strong acid will work not sure what else.
December 8, 2015 by jeff

0.350 L of 0.470 M H2SO4 is mixed with 0.300 L of 0.250 M KOH. What concentration of sulfuric acid remains after neutralization?
October 18, 2016 by james

For the reaction HCl + NaOH → NaCl + H2O, how many moles of hydrochloric acid are required to produce 281.0 g of water?
October 31, 2016 by Andrew

0.150 L of 0.420 M H2SO4 is mixed with 0.100 L of 0.270 M KOH. What concentration of sulfuric acid remains after neutralization?
November 4, 2016 by sadie

With information on the inside cover of the book, calculate how many mL of 70.4 wt% nitric acid should be diluted to 0.250 L to make 3.00 M HNO3. (Answer:47.5 mL)
January 20, 2017 by mojji

A buffer is made up of .300 L each of .500 M KH2PO4 and .317 M K2HPO4. Assuming tha the volumes are additive, calculate a) the pH of the buffer b) the pH of the bugger after the addition of .0500 mol of HCl to .600 L of the buffer. c) the pH of the buffer after the addition of...
May 1, 2007 by James

Please show step by step with answer The equilibrium constant, Kc, for the equilibrium N2O4 (g) <---> 2NO2(g) is 4.6 x 10^-3 If the equilibrium mixture contains 4.0×10^-2 M NO2, what is the concentration of N2O4?
May 31, 2010 by Lynn

In the industrial synthesis of ammonia, the equilibrium constant expression may be written as: Keq= [NH3]^2/[N2][H2]^3 Calculate the value of this equilibrium constant, if the equilibrium concentration of nitrogen in the reaction mixture at 600°C if [N2] = 4.53 and [H2] = 2....
November 18, 2011 by Chemistry Chick

Chemistry chemical equilibrium
1.25 mol of NOCl was placed in a 2.50 L reaction chamber at 427 celciciu degre . After equilibrium was reached, 1.1 mole of NOCl remained. Calculate the equilibrium constant Kc for the reaction
February 18, 2012 by Abdela

Nitric acid is produced commercially by the Ostwald process, represented by the following equations. 4 NH3(g) + 5 O2(g) 4 NO(g) + 6 H2O(g) 2 NO(g) + O2(g) 2 NO2(g) 3 NO2(g) + H2O(l) 2 HNO3(aq) + NO(g) What mass in kg of NH3 must be used to produce 4.4 multiplied by 106 kg HNO3...
August 1, 2013 by Kris

Chemistry(Please check answer)
The equilibrium constant for the reaction, H2(g) + I2(g) == 2 HI(g) is 54.9 at 699.0 K (Kelvin). What is the equilibrium constant for 4 HI(g) == 2 H2(g) + 2 I2(g) under the same conditions? Note: the == indicates the equilibrium double arrow Since the second equation is ...
March 14, 2012 by Hannah

For the formation of ammonia, the equilibrium constant is known to be 5.2 × 10^−5 at 25◦C. After analysis, it is determined that [N2] =3M and [H2]=0.8M, both at equilibrium. How many grams of ammonia are in the 10L reaction vessel at equilibium? Use the ...
April 27, 2014 by Sara

This is about spectrometry. How would the presence of salicylic acid affect the results of the spectrophotometric determination of the purity of ASA? Why? I don't know how you conducted the experiment but I assume you measured a peak in the absorption spectrum of ASA. Since ...
April 25, 2007 by Brissa

AP Chemistry
In 1.33L container, 4.20 AB3, is heated to 400C, and 2.98x10-2(negative 2) moles of A is present at equilibrium. AB3(g) <----> A(g)+ 3B(g) (28.23amu) (a.) Write the expression for K (b.) Calculate the equilibrium concentration of the following gases (i.) B (ii.) AB3 (c...
March 25, 2010 by sheer

March 8, 2007 by Desmond

A) A solution was prepared by dissolving 1.113 g of MgCl2 into water and made up to 50.0 ml, calculate the molar concentration of the solution. B) A 250.0 ml of 0.50 M solution of Na3PO2 solution was prepared by diluting 2.5 M of stock solution. Calculate the volume of stock ...
December 24, 2016 by henry39

4.00 mol of solid A was placed in a sealed 1.00-L container and allowed to decompose into gaseous B and C. The concentration of B steadily increased until it reached 1.20 M, where it remained constant. A(s) <-------> B(g)+C(g) Then, the container volume was doubled and ...
February 5, 2013 by Anon

Which of the following is the most effective buffer system for a pH value of 7.45? Assume all are 1M A. Carbonic acid and sodium bicarbonate B. Sodium bicarbonate and sodium carbonate C. Sodium dihydrogen phosphate and disodium hydrogen phosphate D Hydrogen cyanide and sodium ...
April 11, 2012 by Linda

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?
July 28, 2013 by Anonymous

Answer the following questions based on the graph that represents J.R.'s demand for ribs per week of ribs at Judy's rib shack. a. At the equilibrium price, how many ribs would J.R. be willing to purchase? b. How much is J.R. willing to pay for 20 ribs? c. What is the magnitude...
November 27, 2011 by keith

The percent composition of iron in a sample of steel can be determined by dissolving a sample of steel in concentrated acid. The resulting solution is then titrated with a permanganate solution. When all of the iron has reacted with the permanganate, the solution changes from ...
August 19, 2007 by manny

This is for a lab about determining the equilibrium constant. Given: 5.00mL of .203M Fe(NO3)3 mixed with 100mL of .00205M KSCN in a .5M HNO3 solvent for both solutions. Resulting absorbance for solution is .315. How can i find the total Fe, [Fe*] and SCN, [SCN*] in the system ...
April 3, 2011 by Bob

The HIM department has 200,000 active medical records and the department received 12,081 records requests during the year. The QI indicator of the HIM department is Eighty-five percent of records requests will be located within 15 minutes. Of the 12,081 records in the question...
December 7, 2014 by Anonymous

Compute the boiling point of this solution: 1.00*10^2g C10H8O6S2 (1,5-naphthalenedisulfonic acid) in 1.00*10^2g H2O (nonionizing solute) The freezing point of H2O is Lowered 1.86 Celsius per mole of solute. The boiling point of H2O is Raised 0.512 Celsius per mole of solute.
November 22, 2010 by Jose Reyes

Ap chemistry
Suppose NaOH is added to the following system when it is at equilibrium. NH3 (aq) + H2O (l) = NH4 (aq) + OH (aq) a) in which direction will the reaction shift after the NaOH is added? b) will this stress increase or decrease the value of the reaction quotient, Q? C) will the ...
March 5, 2015 by Ivey

Would someone help me with the's not A.Thnx!! What would happen if the mRNA codon that coded for Cys was mutated in the third position from a U to an A? A The codon would now code for Trp instead of Cys. B A stop codon would be introduced prematurely. C The ...
June 4, 2015 by Azz

What is the equilibrium concentration of ammonium ion in a 0.77 M solution of ammonia (NH3, Kb = 1.8 ´ 10–5) at 25oC?
April 5, 2010 by Anonymous

What is the equilibrium concentration of ammonium ion in a 0.77 M solution of ammonia (NH3, Kb = 1.8 ´ 10–5) at 25oC?
April 5, 2010 by Anonymous

what is the hydronium-ion concentration at equilibrium in a 0.71 M solution of aniline (Kb=4.2x10^-10) at 25 Celsius
March 19, 2013 by Che

what is the percent ionization at equilibrium in a 0.31M solution of dimethylamine (Kb=4.2x10^-10) at 25 Celsius
March 19, 2013 by Che

I have a few questions. 1. write the net ionic equation for a precipitate when solutions of magnesium nitrate and potassium hydroxide form. When I did this equation out, both products were soluble. Am I doing this wrong? 2. A 50.00 mL sample of .0250 M silver nitrate is mixed ...
October 19, 2006 by Christine

Business Analytics ISDS361B
Eli Orchid has designed a new pharmaceutical product, Orchid Relief, which improves the night sleep. Before initiating mass production of the product, Eli Orchid has been market-testing Orchid Relief in Orange County over the past 9 weeks. Now that the daily demand for Orange ...
December 4, 2016 by Kim

7.0 mL of 0.64 M HBr reacts with 38 mL of 0.39 M KOH. 1) What are the moles of acid before the reaction? 2) What are the moles of base before the reaction? 3) What is the limiting reagent? 4) How many moles of excess reagent are there after the reaction? 5) what is the ...
December 6, 2016 by Fontaine

when pressure decreases what happens with the boiling point, it decreases, increases or stays the same? I read the book (the example used is water) were it says that if vapor pressure is less than the pressure pushing down on the surface the bubbles formed collapse; but when ...
May 23, 2007 by Fabiola

If the equilibrium constant is much less than 1, how can you tell where the equilibrium lies? A. Reactants are in the numerator of the equilibrium expression, so equilibrium lies toward the reactants. B. Products are in the numerator of the equilibrium expression, so ...
August 22, 2016 by jessie

chem help!
If the equilibrium constant is much less than 1, how can you tell where the equilibrium lies? A. Reactants are in the numerator of the equilibrium expression, so equilibrium lies toward the reactants. B. Products are in the numerator of the equilibrium expression, so ...
September 9, 2016 by jameson

A chemist studying the equilibrium N2O4(g)<----->2NO2(g) controls the temperature so that keq ( equilibrium constant)= 0.028. At one equilibrium position, the concentration of N2O4 is 1.5 times greater than the concentration of NO2. Find the concentrations of the two ...
November 26, 2013 by Anonymous

Break and thing are examples of what kind of verbs (not "action") Verbs can be in any of the following categories: ~linking or action ~active or passive ~transitive or intransitive Break can be an action, active, and transitive verb. Thing is not a verb. http://grammar.ccc....
March 14, 2007 by Lauryn

The administration of 100mg or more of morphne (molar mass 283) to a patient would be lethel. which of the following would you consider to be a safe dose. a. 1ml of a 1 percent solution (w/v) b. 1ml of a 0.05 M solution c. 1ml of a 100ml/mg solution d. 0.5ml of a 1M solution e...
May 14, 2014 by yollla

AP Chem
At a particular temperature, Kp = 0.25 for the following reaction. N2O4(g) 2 NO2(g) (a) A flask containing only N2O4 at an initial pressure of 5.3 atm is allowed to reach equilibrium. Calculate the equilibrium partial pressures of the gases. (b) A flask containing only NO2 at ...
January 8, 2012 by Bill

Help Chemistry
Can you please tell me if these are right? Determine the pH for the following solutions A [OH-] = 1.0 X 10^-7 M I got 7 B. [H3O+ = 4.2 X 10 ^-3M I got 2.4 C. [H3O+]= 0.0001M I got 4 D. [OH-] = 8.5 X10^-9M I got 5.9 What are the [H3O+] and [OH-] for a solution with the ...
December 7, 2010 by Jessica

How do can you find the difference between these acids/bases with only one indicator? We have 0.1M NaOH, H2SO4, HCl, AlCl3, and Na2CO3. We know the pH of all the solutions (AlCl3 = 2.9, H2SO4 = 0.7, HCl = 1, Na2CO3 = 11.8, NaOH = 13). We only can use 1 indicator to determine ...
May 11, 2016 by Jaime

Which of the following statements is not true about a particle executing Simple Harmonic Motion? Choose one answer. a. Its velocity is maximum at the equilibrium position. b. Its acceleration depends only upon its displacement at that instant. c. Its velocity is zero at the ...
February 26, 2011 by calous --- HELP PLEASEE!!!

Baking powder consists of 4 ingredients – CaHPO4, NaAl(SO4)2, NaHCO3 and cornstarch. Using the guidelines below, determine the masses of each ingredient in a sample of baking powder using the following specifications:. (Tip: Parts i, ii v and vi below should be VERY easy...
February 24, 2015 by me

Assume that no heat is lost to the surroundings and calculate the enthalpy involved when 200. mL of .10 M potassium hydroxide and 200. mL of .10 M hydrochloric acid are mixed. Both solutions began at room temperature, 24.5 degrees celsius, and have densities very close to 1.00...
April 14, 2014 by Devon

This is a problem I got on my Mastering Chemistry homework: Consider the following reaction: H2(g)+I2(g)⇌2HI(g) A reaction mixture at equilibrium at 175 K contains PH2=0.958atm, PI2=0.877atm, and PHI=0.020atm. A second reaction mixture, also at 175 K, contains PH2=PI2= 0...
March 16, 2014 by Anna

Which of the following are properties of basic solutions? a.They turn the dye litmus red. b.They taste sour. c.They feel slippery. d.They react with active metals to produce hydrogen gas.
May 4, 2011 by candy

can some one pleasee help me!!!
The molecular structures of two ‘penicillin-like’ compounds, A and B. in the compound A the C-C-N ring is intentionally bold, as is the C-C-C-C-N ring in compound B. By comparing these structures assess which of A and B, might be (i) more active than penicillin against ...
June 30, 2007 by s

Physics ideal gases
If 2 samples of nitrogen (different PVTs) are separated by a conductive barrier, they will eventually achieve equilibrium, I believe. Am I right to assume that the final T and P at equilibrium in this case would be the SAME T and P if the barrier was highly insulated, then ...
January 3, 2009 by charlie

10th grade
What is the compound name fo HC2H3O2?
November 5, 2010 by jhgjgk

0.16 M HC2H3O2 and 0.31 M of NAC2H3O2 titrated with what ml of 0.25 M HCL
March 24, 2011 by bID

2.   The 1978 Supreme Court decision in Bakke v. Regents of the University of California      A. established the rights of students to appeal college admissions policies. B. established the "red state-blue state" divide. C. ruled in favor of affirmative action within ...
July 12, 2012 by Al

The equilibrium constant, Kp, for the following reaction is 0.497 at 500 K: PCl5(g) PCl3(g) + Cl2(g) Calculate the equilibrium partial pressures of all species when PCl5(g) is introduced into an evacuated flask at a pressure of 1.46 atm at 500 K. PPCl5 = atm PPCl3 = atm PCl2...
March 21, 2015 by Kayla23

The molar mass of the reagent, Fe(NH4)2(SO4)2.6H2O is 392.14 g/mol. Now suppose the measured mass of Fe(NH4)2(SO4)2.6H2O during the practical was 0.0218 g and this was dissolved in 50ml of deionized water that contains 1 to 2ml of concentrated sulphuric acid and transfer ...
November 10, 2015 by Mara

Hi! I need help with the step by step procedure for chemical equilibrium problems. Here is an example: Given two reactions: a. PbCl2 <---> Pb^(2+) + 2Cl^(-) K = 1.76*10^(-10) b. AgCl <---> Ag^(+) + Cl^(-) K = 1.11*10^(-4) What is the equilibrium constanct K(final) ...
February 25, 2009 by sakura1990

Write the dissociation reaction and the corresponding Ka equilibrium expression for each of the following acids in water. (Use the lowest possible coefficients. Include states-of-matter under SATP conditions in your answer. Omit water in your answer.) (a) HC_2H_3O_2 (b) Co(H2O...
March 3, 2012 by Chris

chemistry 105
Sulfuric acid dissolves aluminum metal according to the following reaction: 2Al(s)+3H2SO4(aq)-->Al2(SO4)3(aq)+3H2(g) Suppose you wanted to dissolve an aluminum block with a mass of 14.7 g. What minimum mass of H2SO4(in g) would you need? What mass of H2 gas(in g) would be ...
October 10, 2011 by julie

Below are 2 word equations. For each, identify the type of equation and write a chemical equation with symbols for the word equation. (I have solved the equations but I am not sure what the question means by ``type of equation``) a) Potassium was discovered in 1807 by ...
September 8, 2015 by Anonymous

Write the net ionic equation for the reaction between sulfuric acid and potassium hydroxide. I got 2H^+ + 2OH^-1 ==> 2H2O. Is this correct?? Thanks.
December 2, 2007 by Lucy

Draw three repeating units of the condensation polymer made from ethanedioic acid and ethanediol. if anyone has a weblink that illustrates this may you please send it?
May 9, 2008 by Mable

why does there come out a foam like silver bubbles wen you mix dilute sulpheric acid and magnesium metal oxide
October 6, 2008 by jurgen

What volume in mL of .100 M NaOH would be required to titrate a 297 mg sample of a weak acid with an equivalent weight of 126 grams?
November 30, 2009 by Telly

can anyone give me a good web site to review Alcohols Aldehydes o Ethers o Ketones o Carboxylic acid o Esters o Amines o Amides
March 31, 2010 by blue

How many moles of base are needed to neutralize 2 mol of acid for HNO3 + KOH - KNO3 + H2O?. Can u show your work please:) Thanks a bunch
May 4, 2010 by Stacey

organic chemistry
what is the major and minor product of 3-methyl 1-pentene + propanol reacted with sulfuric acid?! Detailed mechanism reaction please?? Thank you!
May 19, 2010 by jamie

List three ways in which human activities have contributed to the production of gases that dissolve in water to form acid precipitation
August 18, 2010 by christine

A 0.446 g- sample of an unknown monoprotic acid was titrated with 0.105 M KOH. the molar mass is 120 g/mol What is the pKa value?
November 22, 2010 by james

An old bottle of 12.3 M hydrochloric acid has only 33 mL left in it. What is the HCl concentration if enough water is added so that the final volume is 513 mL?
November 29, 2010 by masin

If you have Hydrochloric acid, how many grams of aluminum must you use to produce 57.0 L of hydrogen at STP? 2Al(s)+6HCl(aq) --> 3H2(g)+2AlCl3(aq)
December 8, 2010 by Brittany

how could you maximize the rate of reaction of magnesium and hydrochloric acid other than concentration and surface area techniques.tell a experiment in short.
April 14, 2011 by Anjan

0.560g of potassium hydroxide is added to 25.0 cm^3 of 1.00 mol dm^-3 of hydrochloric acid.Find the limiting reagent & please show the working.THANKS IN ADVANCE.
May 8, 2011 by ALIYAH

The Cell membrane contains A) a double layer of fatty acid tails and phosphate heads B) cholesterol C) protein channels or pores D) a and b E A,B, and C
May 3, 2012 by Bio

what mass of water is expected when 5.80 grams of sodium carbonate reacts with excess sulfuric acid? what volume of gas is produced at STP?
January 24, 2013 by jessica

what mass of water is expected when 5.80 grams of sodium carbonate reacts with excess sulfuric acid? what volume of gas is produced at STP?
January 24, 2013 by jessica

org. chem
what would the oxidation product 1. 2-methylpentnal 2. 3-pentanone My answers: 1. 2-methylpentanoic acid 2. no further reaction I just want to be sure I'm doing this right. Thanks.
February 15, 2013 by meghan

What volume of hydrogen, measured at 25 C and 1.00 atm can be produced by dissolving 5.0 g of magnesium in hydrochloric acid? (Write and balance the equation for the reaction first.)
April 8, 2013 by Kate

What is the difference between the two strong acids, nitric and hydrochloric acid, when they behave as the oxidised forms in a reduction half-equation?
May 6, 2013 by alex

chemistry calculation
I need to know what volume of liquid phosphoric acid at 85%, H3PO4 with density of 1.685 will replace 5 grams of powdered NaH2PO4. H2O. thanks
June 1, 2013 by sue

Calculates the work done (in joules) when 42.8 g of tin dissolves in excess acid at 1.10 atm and 23 degrees Celcius. Assume ideal gas behaviour.
September 19, 2013 by Vanessa

Calculates the work done (in joules) when 42.8 g of tin dissolves in excess acid at 1.10 atm and 23 degrees Celcius. Assume ideal gas behaviour.
September 19, 2013 by Vanessa

What is a form of pollution triggered by a formation of a gas and can have dramatic effects? fog pesticides acid rain oil spill
December 12, 2013 by Aaron

what would be a possible reason for the melting point of a purified sample to be the same as the literature value in a synthesis of salicyclic acid lab??
January 26, 2014 by Angela

Write the reactions that occur for the benzoic acid/sodium benzoate buffer when you react it with HNO3 and KOH. How would I go about writing it? Thanks.
March 26, 2014 by Rainbow

If the titration of a 25.0 mL sample of calcium hydroxide requires 34.45 mL of 0.100 M perchloric acid, what is the molarity of the base? 2 HClO4(aq) + Ca(OH)2(aq) → Ca(ClO4)2(aq) + 2 H2O(l)
April 12, 2014 by John Cook

ap chemistry
what would have happened to your calculated molar mass if some lauric acid was spiled before finding the freezing point?
January 8, 2015 by de

for the titration of n.89g of an uk diaprotic acid with .2500 N sodium hydroxide, it took 35.5 mL to reach the phenolphthalein endpoint, calculate the molar mass.
February 2, 2015 by Amberra

A commercially. Available. Sample of sulphuric acid is 15percent h2so4 by weight density 1.10gm per ml find molality and normality
May 6, 2015 by rishikanta rathore

Experimental results for hydrochloric acid (neutralization) are always a little less negative than the usual constant (-57.35kJ). Suggest reasons for this.
November 16, 2015 by Wex

you have pond that has become too acidic from acid rain for survival of you fish what kind of chemical could you add to the water to countract the acidity?
November 21, 2015 by abshir

  1. Pages:
  2. <<Prev
  3. 64
  4. 65
  5. 66
  6. 67
  7. 68
  8. 69
  9. 70
  10. 71
  11. 72
  12. 73
  13. 74
  14. 75
  15. 76
  16. 77
  17. 78
  18. Next>>