September 23, 2014

Search: Chemistry - Le Chatelier's principle(help)

Number of results: 46,305

System: Co(H2O)6^2+(aq) + 4Cl^-(aq) <==> CoCl4^2-(aq) + 6H2O(l) Q: What would happen when you add HCl as a source of Cl- ions? Explain the observations in terms of Le Chatelier's principle. Would the answer be that the reaction shifts to the right? How would you say this...
November 14, 2008 by Tanimoto

im doing a lab on le chatelier's priciple and the question is 'describe what you observe when the saturated solution of sodium chloride was stressed by the addition of CL- ions, write the ionic equation and explain how le chatelier's principle is applied to this experiment.' i...
January 24, 2010 by Anonymous

chemistry help plz
Le chatelier's principle? co(g)+cl2(g)=cocl2(g)is reversible and ,after a certain amount of time ,will reach equilibrium.Explain,using Le chatelier's principle,what effect: 1)increasing the pressure (at constant temperature) 2)increasing the temperature (at constant pressure) ...
January 5, 2013 by centya

RE: Le Chatelier's principle. this was the whole question i was given. Write a short account of around 250 words in total, with reference to Le Chatelierís principle, in which you explain the following: (i) The effect on the equilibrium yield of nitric oxide of increasing the ...
January 28, 2009 by trigger

un-ionized aspirn molecules can readily penetrate the stomach lining into a region of less adicity. This is where the stomach irritation associated with aspirn occurs. Use Le Chatelier's principle to explain why irritation occurs in this area. Could someone explain the ...
July 27, 2009 by Lena

defie le chatelier's principle and the role equilibrium plays in the reduction of stress
January 22, 2010 by lala

How does Le Chatelier's principle explain the result you obtained after the addition of NaOH?
April 7, 2012 by Emily

What was Le Chatelierís principle, in The effect on the equilibrium yield of nitric oxide of increasing the pressure?
January 6, 2009 by trigger

How does Le Chatelier's principle explain the result you obtained when you added HCL to a suspension of Ca(OH)2 in water?
October 9, 2011 by mary

a. what is the effect on the Kc when the temperature of an exothermic reaction is lowered? b. according to Le Chatelier's principle, how is equilibrium in part a established.
November 30, 2012 by Boo Boo

Very carefully, but breifly discuss, with specific example, Le Chatelier Principle and its relationship to common ion effect.
October 13, 2011 by travis

Chemistry - Le Chatelier's principle(help)
Le Chatelier's principle states that " a dynamic equilibrium tends to respond as to relieve the effect of any change in the conditions that affect the equilibrium." I understand the above, now i am trying to predict the response of the system and i am confused how to do it, so...
March 22, 2011 by Babelii

NH4HS(s) reverse reaction arrow NH3(g) + H2S(g) Using Le Chatelier's principle, explain how increasing the temperature would affect the equilibrium.
May 25, 2011 by Kat

I need to be able to tie in acetic acid and boric acid. To decipher properties of acid-base chemistry and how they adhere to Le Chatelierís principle. I appreciate any input....
November 30, 2010 by Colleen

According to Le Chatelier's principle, does the equilibrium shift to the products or reactants when O2 is added to the equilibrium mixture of the following: A. 302(g) - 2O3(g)
April 20, 2011 by Eric

science - chemistry (Le Chatelier's)
How does the concentration of the reactants affect the amount of product obtained? In general, does an increased concentration of reactant give more product? What are the exceptions? Does it matter if it's exothermic or endothermic? If the reactants/products are in liquid/...
August 25, 2007 by siobhan

How does Le Chatelier's principle explain the result you obtained when you added HCL to a suspension of Ca(OH)2 in water? Where the result was, precipiatate dissappeared and an increase in temperature resulted.
October 9, 2011 by mary

The system H2 (g) + 3N2 (g) = NH3 (s) is at equilibrium.Use Le Chatelier's principle to predict the direction in which the equilibrium will shift if the ammonia is withdrawn from the reaction chamber.
March 6, 2013 by Shane

How does Le Chatelier's principle explain the result you obtained when you add HCL to a suspension of Ca(OH)2 in water? Where the result was, precipitate dissappeared and an increase in temperature resulted.
February 24, 2014 by J

I was given extra credit to find who Le Ch‚telier's High School Principal was. Not his PrincipLE, but his PrincipAL. My chemistry teacher told us only one student of his out of all these years came with the answer. Think outside of the box. Thanks.
March 2, 2013 by Enrico

I was given extra credit to find who Le Ch‚telier's High School Principal was. Not his PrincipLE, but his PrincipAL. My chemistry teacher told us only one student of his out of all these years came with the answer. Think outside of the box. Thanks.
March 11, 2013 by John

Methanol, CH3OH, is produced on an industrial scale from carbon monoxide and hydrogen. At the temperatures used, gaseous methanol is formed according to the following thermochemical equation: CO(g)+ 2H2(g) <---> CH3OH(g) H = -90Kj 1. State Le Chateliers principle and ...
March 4, 2007 by Jon

____ 14. Adding a charged particle common to two solutes decreases solute concentration. This observation demonstrates a. the common-ion effect. c. hydrolysis. b. Le Ch‚telier's principle. d. buffering.
March 1, 2011 by alex

This is concerning Le Chatelier's Principle and Equilbrium... After I give a definition of what it means when it is said that salt is soluble and what is meant by insoluble, I am asked: Why are these terms very broad and not very accurate? Can someone start me on this... ...
February 21, 2007 by Marisol

Using the Le Chatelier's principle, predict the direction of the net reaction in each of the following equilibrium systems, as a result of increasing the pressure at constant temperature. a)N2(g) + O2(g) ==> 2NO(g) <== b)PCl5 ==> PCl3(g) + Cl2(g) <== c)CO(g) + Cl2(...
June 14, 2010 by karl

Chemistry Help.......
State the Le Chatelier's principle and explain the following i) The effect that incresing the pressure will have on the eaualibrium yield of methanol ii) The effect of increasing the temperature will have on the equalibrium yeild of methanol iii) The effect of the increasing ...
March 12, 2007 by Lacey

CHEM-Le' Chatelier's Principle
Use Le' Chatelier's Principle. this is a solution at equilibrium: 2CrO4^2-(aq)+ 2H^+(aq)< >Cr2O7^2-(aq) +H20 2CrO4^2- yellow Cr2O7^2- orange I just have to make predictions of the colour changes when: a)Add 0.3 M NaOH drop to 5 drops of 0.3 M K2CrO4 b)Add 0.3 M HCl by ...
March 4, 2009 by lostttt

i just have a question about le chatelier's principle lets say you have: A(g) + B(s) --> C(g) + D(g) does adding more of B which is a solid shift it to the right? or will it have no effect because it is a solid? thanks
April 19, 2009 by brad

Le Chatelier's Principle
If the equation is : Cd2+(aq) + Cl-(aq) °Í CdCl+ What would happen when Na+ is added would it shift to the right or will there be no change/effect to the system?
April 19, 2011 by Nicole

Chemistry- Le chatelier's Principle
HOw would you predict the colour change or changes in number of states for the following: To a solution of 5 drops of 0.3 M K2CrO4 ans 2 drops of 0.3M NaOH add a drop at a time 0.1 M Ba(NO3)2 until a change is noticed. Given: BaCrO4(s) ---> Ba2+ + CrO42- 2CrO42-+2H+ --->...
March 4, 2009 by meme

Consider the following buffer equilibrium: HF (high concentration) + H2O <--> H3O+ (low concentration) + F- ( high concentration) Using Le Chatelier's Principle, explain what happens to the pH of the buffer solution when a small amount of NaOH is added. Wouldn't OH- ...
June 3, 2010 by sh

Organic Chemistry
The purpose of adding concentrated H2SO4 to the Diels-Alder adduct was to: A. hydrolyze the product to make the product precipitate more easily B. catalyze the diels alder reaction C. use Le Chatelierís principle to drive the reaction to completion D. to quench excess reagents...
March 6, 2009 by nilee

Chemistry - Le Chatelier's Principle
Hi, I have a question regarding the following chemical equilibrium equation: 2CrO4^2- + 2H3O^+ <--> Cr2O7^2- + 3H2O The question is: how would you manipulate the above equation to produce more Cr2O7^2- ions without adding any Chromium based compounds? I understand the ...
March 9, 2014 by Constantine

i need help solving this Benzoic acid is a weak, monoprotic acid (Ka = 6.3 ◊ 10−5). Calculate the pH and the percent dissociation of each of the following solutions of benzoic acid. Then use Le Ch‚telierís principle to explain the trend in percent dissociation of the ...
June 7, 2014 by Q

Imagine a hypothetical reacion for which, H = 0 kJ ∑ mol−1. Considering the Le Chatelier principle, which of the following statements is true? a. Raising the temperature of the system will have no effect. b. Raising the temperature of the system will cause the reaction ...
February 9, 2011 by Eddy

Could someone explain Le Chatelier's principle to me? Thanks Reactions tend to go to the direction that reduces stress: stress from pressure, temperature. If a reaction gives off heat (exothermic), it will go faster if temperature is reduced, ie, it is easier to give off heat ...
March 15, 2007 by Aubrey

An air purifiction system involving litium hydroxide, LiOH, was used. LiOH absorbs carbon dioxide. 2LiOH(s) + CO2(g) <---> Li2CO3(s) + H2O(l) Use Le Chatelier's principle to explain why the amount of time astronauts can spend in a space-craft is limited?
July 25, 2009 by Lena

college physics
"The Magnitude of the buoyant force is equal to the weight of fluid displacedĒ is a statement of which principle in the study of fluids? Select one: a. Pascal's Principle b. Archimedes' Principle c. Bernouilliís Principle d. The Equation of Continuity
June 16, 2014 by allen

What was Le Chatelier's principle on the effect on the equilibrium yield of nitric oxide of increasing the pressure and The effect on the equilibrium yield of nitric oxide of increasing the tempreture
January 27, 2009 by trigger

Hi, I am stuck on this question and would appreciate some guidance. The question states " The value of Kw decreases as the temperature decreases. Is the auto-ionization of water an exothermic or endothermic reaction in the forward direction?" I feel like the answer should be ...
May 31, 2013 by Charlotte

Question: 1. The value of the equilibrium constant for the reaction H2CO3(aq) + energy ÉnÉnH2O(l) + CO2(g) can be changed by introducing a change to which component of the equation? This relates to the Le Chatelier principle. Thanks! Keq (the constant itself) changes only with...
June 14, 2006 by ???

Methanol, CH3OH, is produced on an industrial scale from carbon monoxide and hydrogen. At the temperatures used, gaseous methanol is formed according to the following thermochemical equation: CO(g)+ 2H2(g) <---> CH3OH(g) Ā£H = -90Kj 1. State Le Chateliers principle and ...
March 2, 2007 by Adam

operating conditions 250-300 celcius and 50-100 atmospheres are consistent with the aims of achieving a high equilibrium yield of methanol and a high rate of production. noting any conflicts, explain the role of a copper catalyst noting how its presence helps with the conflict...
March 20, 2007 by c

Sara is 30 years old and came from a two-parent, low-income household in an urban environment. She has reached a turning point at which she has begun to appreciate her current bidirectional life stage in conjunction with heredity and the circumstances of her environment. Sara ...
August 25, 2014 by Courtney

Ethics in Criminal Justice
The rational, overriding principle promoted by utilitarianism is the: A. Greatest number principle. B. Greatest happiness principle. C. Greatest utility principle. D. None of the above. Now my textbook mentions two in this sentence: "The rational, overriding principle promoted...
May 3, 2014 by Erica

language please check
1-the baby was the PRINCIPLE reason for his happiness 2-the jury heard only the PRINCIPLE facts 3-It's not the facts that upset me,it's the PRICIPALS of the case 4-his hay fever was the PRINCIPLE reason for his sneezing 5-she was a person of strong PRINCIPLE
April 16, 2010 by astasia

One proposed design for a Mars rover uses a methane gas fuel cell as its power supply. The methane fuel can be made on Mars using a chemical reaction that has been known for over 100-a the Sabatier methanation reaction: C02(g) + 4H2(g)<--> CH4(g) +2H2O(g) Enthalpy change...
November 28, 2010 by Mary

I have to fill in the blank with the a term, short phrase or number The Blank describes the sequence in which orbitals are filled. Is it The Pauli exclusion principle?? No. The Pauli exclusion principle states that no two electrons may occupy the same energy position. What is ...
October 24, 2006 by Bryan

Chemistry 12
4. a. Using Le Chatelier's principle, what effect will an increase of temperature have on the following system? H2O(l) + 57 kJ ↔ H+(aq) + OH-(aq) b. What is the expression for the constant for this reaction? c. What effect will an increase in temperature have on the ...
May 22, 2011 by Sareena

I have [CoCl4}2 /{Co(h2O)6}2+and add AgNo3 what does silvirnitrate does and how is that consit with Chatelier
June 1, 2010 by Esperanza

Chemistry: Le Chatelier's
What happens when CoCl2 is added to the following system? Co(H20)6 + Cl + heat <-> CoCl4 + 6H20?
November 20, 2012 by Evelyn

If the temperature of the system PCl5 (g) =PCl3 (s) + Cl2 (g) + 92.5 kj. is increased, predict the direction of th Le Chatelier's shift.
March 6, 2013 by Shane

Can anyone explain Le Chatelier's principal? How you know when it shifts to the products and reactants? Such as in 3O2(g) --><-- 2O3(G) 2CO2(g) --><-- 2CO(g) + O2 Thanks!!
June 22, 2010 by samantha

For each of the following equilibria, use Le Chatelier's principle to predict the direction of reaction when the volume is increased. (a) C(s) + H2O(g) CO(g) + H2(g) (b) 2 H2(g) + O2(g) 2 H2O(g) (c) 2 Fe(s) + 3 H2O(g) Fe2O3(s) + 3 H2(g) a i put no change because there are the ...
February 21, 2013 by Hannah

Does anybody know the principle quantum number of an atom that has s, p, d, f orbitals? I'm pretty sure the number is inbetween 2-4, but I am unsure of how to figure out the principle quantum number just using that information. Thanks in advance!
March 9, 2010 by Marla

I completely understand Le Chateliers principle but I have no idea about these questions. They're due tomorrow so fast help would be appreciated. Why did adding water to the equilibrium involving CoCl_4_^2-^ cause the color to change? Use Le Chateliers principle to explain the...
December 1, 2010 by k

I have this question in front of me concerning Methanol (CH3OH) & how geseous methanol is formed via the following thermochemical equation: CO(g)+2H2(g)°ÍCH3OH(g)∆H=-90kJ . Now, it asks me (explanations should show a clear understanding of how Le Chatelier°Įs principle ...
February 7, 2007 by Travis

I am having great difficulty with the following questions. Any and all help will be greatly appreciated. I have read the chapter and even looked up online tutorials. I still do not understand it. 2 NO (G) + O2 (G) > 2 NO2 (G) Write the equilibrium constant expression for ...
September 22, 2014 by Lissa

I attempted to answer some but I jsut don't know if what I wrote is correct so will you please help me figure out these answers. Predict the effect that the following changes or stresses would have on the given equilibrium, a) CO2(aq) <=> CO2(aq) (Increasing temperature...
May 16, 2007 by Linda

Write the correct electronic configuration of Pd,Ag,Pt&Au. I think for (Pd)=1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^0 4d^10 (Ag)=1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^1 4d^10 (Pt)=1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6 6s^1 5d^9 4f^14 (Au)=1s^2 2s^2...
November 19, 2011 by Meron

Using Heisenberg's uncertainty principle, calculate the uncertainty in the position of the following. a 1.32-mg mosquito moving at a speed of 1.61 m/s if the speed is known to within Ī 0.01 m/s I used the principle and got 2.48e-29 its wrong..and since its a fly i thought it ...
October 23, 2011 by Karina

Can you give me an example of a compound that can make Ba3(PO4)2 even more insoluble than it already is (and can you tell me why, just for my own understanding)? You use the common ion effect which is just an extension of the Le Chatelier's Principle. The solubility of Ba3(PO4...
February 19, 2007 by Lacey

Ok, so using Le Chatelier's Principle If you add heat to an exothermic reaction, the equilibrium will shift to the left. If you remove heat to an exothermic reaction, the equilibrium will shift to the right. What is it for an ENDOTHERMIC reaction? If you add a substance, the ...
June 4, 2013 by K

Chemistry Help
The orbital diagram shown here has some mistakes in it. Indicate which of the following rules and principles were not observed when this diagram was constructed. Select all that apply. 1. aufbau principle 2. Pauli exclusion principle 3. Hund's rule This is an orbital diagram: ...
November 21, 2010 by Sarah

Colledge english check
two worded definitions for those confusing homophones. the rule: (principal, principle) =principle
June 22, 2010 by Ariel

Are operating conditions (250 to 300 degees and 50 to 100 atmosphere) consistent with achieving high equilibrium yield of methanol and high production rate. Any conflicts? What is the copper based catalyst? How does its presence help address conflicts. What would this do to ...
March 11, 2007 by Charley

I'm reviewing for a test and I'm on Le Chatelier's principle. Decreasing the temperature of an exothermic reaction shifts the equilibrium to the right? I understood this weeks ago but now I can't remember. Wouldn't decreasing the temperature cause there to be less collisions ...
April 9, 2013 by a Canadian

Accounting 1 Help! 1. An accountant records a transaction when cash is paid or received under which basis of accounting? cash deferred accrual liability 2. When unearned revenue is initially recorded as a revenue, the adjusting entry would include a credit to a liability. ...
April 15, 2014 by Mo

HS Math
Please help answer.. What is the principle of powers? When solving a radical equation how do we use the principle of powers to eliminate radicals
September 14, 2010 by Jen

Please help... What is the principle of powers? When solving a radical equation how do we use the principle of powers to eliminate radicals
September 14, 2010 by Jesse

What is the principle of powers? Describe in your own words. When solving a radical equation, how do we use the principle of powers to eliminate radicals? Demonstrate with an example.
November 17, 2011 by Allison

The Bernouilli equation is a statement of which physical principle? Select one: a. COnservation of Momentum b. Newton's Second Law c. Pascal's Principle d. Conservation of Energy
June 16, 2014 by jake

Property taxes, which are calculated as a percentage of the value of a home, are an example of a. the benefits- recieved principle b. a regressive tax c. the ability to pay principle d. a proportional tax
May 10, 2010 by Mary

What would be the effect of removing either the Matching Principle or the Revenue Recognition Principle from the process? Use a concrete example of how doing so might affect accounting in a given period.
August 24, 2011 by michelle

Hello, for in the book of Phillipians in chapter 2 would it relate to the Ethical code of principal with psychologists under principle C integrity and for general principle would it be number 3 human relations thanks
May 22, 2012 by Thomas

The Aufbau Principle is concerned with what?
November 14, 2011 by Betty

Earth, Space and Science
8. A geologist is studying a section of sedimentary rock layers that have been newly exposed by a landslide. Based on what principle, the geologist would assume that the layers increased in age as they looked at them from top to bottom. A. unitarianism B. Principle of ...
March 5, 2014 by Cassie

Does the aufbau principle apply to radioactive isotopes?
November 11, 2010 by Beth

What is the principle source of Caffeine? I cannot find it at all!!
March 10, 2011 by annonymous

What is the energy of an electron with a principle quantum number of n=2
July 21, 2012 by maryam

What is the basic physical principle that chromatoraphy is based upon?
April 29, 2009 by chris

Economics-Tax Question
I know the answer to the following question is either (c) regressive tax augement or (d) the ability-to-pay principal. I am not sure which one? "A $1,000.00 tax paid by a poor person may be a larger sacrifise than a $10,000 tax paid by a wealthy person" is an argrment based on...
April 8, 2008 by G

what is the basic physical principle that chromatography is based upon?
April 28, 2009 by brown

what is the basic physical principle that chromatography is based upon?
April 28, 2009 by brown

how many sublevels exist in the fourth principle energy level? a) 2 b) 4 c) 16 d) an infinite number
February 28, 2008 by Megan

An annuity is developed and used based on the concept of time value of money. Please solve for the principle required when one retires so that a payment of $1500.00 is received each month for 30 years (360 months). Assume that the interest rate for the payout is 5% and the ...
June 9, 2012 by John

How do these things shift the direction of a chemical reaction?: -adding/removing reactants -adding/removing products -adding/removing energy This is how I think I understand it: -adding more reactants pushes it to the right -removing reactants pushes it to the left -adding ...
March 17, 2007 by Mira

Give the electron configurations of 22Ti+2 Do you know how to do this? Here is a site that will help you. Repost with specific questions about the points you don't understand. http://www.iun.edu/~cpanhd/C101webnotes/modern-atomic-theory/aufbau-principle.html
October 29, 2006 by Justyna

October 18, 2007 by KELLY

What is the chemical structure, its principle source, its legals uses (if any) and its relative addictiveness on scale 1-10 : CAFFEINE
March 8, 2011 by annonymous

*The Nernst Equation and pH* Sulfuric acid is a very strong acid that can act as an oxidizing agent at high concentrations (low pH). Under standard conditions, sulfuric acid has a low reduction potential, SO4^2-(aq) + 4H^+(aq) + 2e^- <=> SO2(g) + 2H2O(l),.....+0.20V ...
March 31, 2010 by Sarah

According to the principle of supply and demand, the price you pay for a product is determined both by its availability and by consumer demand for the product. On the basis of this principle, which minerals do you think a higher value, iron-containing minerals or feldsparS? ...
December 11, 2013 by john

Cash Management Matrix For each principle in the matrix,describe how the principle ensures the reliability of a company's financial statements and provide at least one example of how the principle might work in a real company. Principles of Internal Control Establishment of ...
May 10, 2010 by Tony

The principle of self-government emphasizes majority rule, whereas the principle of liberty emphasizes individual rights. These principles: a. Are universal and the foundation of all legitimate governments. b. Have no real meaning in practice. c. Are not fully consistent with ...
October 4, 2011 by Tonya

reading/language please check
*principle or principal(do these make sense?) -She was a person of strong PRINCIPAL. -The PRICIPALS sat together at the district confrence. -How much of the total in my savings account is PRINCIPAL? -His hay fever was the PRINCIPAL reason for his sneezing. -It's not the facts ...
April 16, 2010 by astasia

Chemistry Electron Configuration Questions
I do not understand anything about electron configuration. How do you figure out if the element is in P,D,S,orF? What do the subscripts represent? What is a subshell? I am so confused!! You figure it out by using the Aufgau principle, placing electrons in the proper order in ...
October 25, 2006 by cbarnett

Chemistry - Science (Dr. Bob222)
Liquid chloroform (CHCl3) is placed in a closed container and allowed to equilibrate with chloroform vapor. With the temperature held constant, additional chloroform is introduced into the system, and the vapor-liquid equilibrium is reestablished. Following this, the ...
May 10, 2014 by Ana

Earth Science
True or false? ------------------------- Although there is scientific evidence and many scientific theories about the origin of the universe, how it all happened remains a question. Which statement is true? ------------------------- The perfect cosmological principle is the ...
January 17, 2012 by Nick

By using the method of neutralization the acidity of the bee sting can be neutralized. What is the underlying principle and what are the chemical equations involved.
January 28, 2014 by kim jung hee

Maths - Pigeon-hole principle
Using the Pigeon-hole principle... 91 five-digit numbers are written on a blackboard. Prove that one can find three numbers on the blackboard such that the sums of their digits are equal.
September 30, 2008 by Lexi

Pages: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Next>>