Define Le–Chatlier’s principle.

1 Answer

Answer :

If a system in equilibrium is disturbed at equilibrium it will move in that direction where change is minimized.

Related questions

Description : What is solubility product?

Last Answer : The product of molar solubilities of the ions of weak electrolyte at equilibrium stage is called solubility product. It is represented by Ksp

Description : What is common ion effect?

Last Answer : The decrease in ionization of a weak electrolyte by adding another strong electrolyte having common ion.e.g ionization of NaCl is decreased by passing HCl through NaCl solution.

Description : How can you co–relate Ka with Kc?

Last Answer : Ka is dissociation constant of an acid while Kc is the equilibrium constant suppose an acid HA Ionize as HA + H2O  H3O+ + A– Kc = concentration of [H2O] almost remains constant so we can write. Kc = Kc [H2O] = ka Ka =

Description : A buffer consists of a weak acid and is salt.

Last Answer : (i) CH3COOH + CH3COONa (ii) C6H5COOH + C6H5COONa (iii) H2CO3 + NaHCO3 (iv) H3PO3 + NaH2PO4

Description : How can you purify NaCl by common ion effect?

Last Answer : The impurities present in the common salt are CaCl2 MgCl2 and Na2SO4 in it. These impurities can be removed by common Ion effect. For this purpose a saturated solution of NaCl is prepared. Then ... electrolyte than NaCl Ionization of NaCl is suppressed by passing HCl gas and it is precipitated out.

Description : Prove that Kw is ionic product of water and its value is 1 x 10–14 at 25o.

Last Answer : Water undergoes self ionization as 2H2O  H3O+ + OH– or H2O  H+ + OH– Kc [H2O] = [H+] [OH–] Kw = [H+] [OH–] At 25oC the value of Kw ionic product have been measured. Its value is 1 x 10–14.

Description : What is the relationship b/w kc, kp kc & kn?

Last Answer : These four parameters are related as. Kp = Kc (RT)n = Kx (P)n = Kn When mole of products are reactant are equal i.e. n = 0 their Kp = kc = dx = kn

Description : How the change in pressure at equilibrium position effect the following reaction? PCl5 PCl3 + Cl2

Last Answer : According to Le–chatlier’s principle, by increasing pressure the reaction will move toward less number of moles. In the above reaction, by increasing pressure the reaction will move in backward direction.

Description : A catalyst does not change the position of equilibrium but this equilibrium position approach earlier. Why?

Last Answer : A catalyst decrease the energy of activation required by reacting substance so the position of equilibrium reaches earlier.

Description : What are optimum conditions for the formation of NH3 by Haber’s process? N2(g) + 3H2(g) 2NH3(g) H = -92.46 kJ/m

Last Answer : (i) As the reaction is exothermic max yield is obtained at low temp. (ii) By applying pressure, more product is obtained. According four moles of reactants produce two moles of product so by applying ... (vi) Rate of reaction can also be increase with the help of catalyst like iron or iron oxide.

Description : How value of Kc can help to predict the extent to which a chemical reaction can take place?

Last Answer : The extent of reaction depends upon the magnitude of Kc. i.e. (i) Very small value of Kc: when Kc is very small the forward reaction will not occur to an appreciable extent ... neither very large nor very small, the equilibrium mixture contains appreciable amounts of both reactant and products.

Description : How Kc can be applied to calculate direction of chemical reaction?

Last Answer : (i) If < Kc Then the reaction will proceed in the forward direction until the equilibrium is established. (ii) If > Kc Then the reaction will proceed in the backward direction until the equilibrium is established. If = kc Then the reaction is already in equilibrium.

Description : What is buffer capacity?

Last Answer : The amount of acid or base which a buffer can absorb without significant charge in PH is called buffer capacity. Buffer capacity is the ability of buffer to resist the change in its PH value.

Description : Discuss the factors on which buffer PH depends.

Last Answer : PH of buffer depends upon two factors. (i) Pka or ka value of an acid (ii) Concentration of salt and acid taken for the buffer.

Description : Why we need buffer solution in daily life?

Last Answer : Buffers can resist the charge of its PH value therefore they are required in chemical analysis, pharmaceuticals, electroplating, photography, beverage industry, microbiology molecular biology, soil science and in quantitative ... PH 7.35. If it decreases upto 7 or goes upto 8 death may occur.

Description : What are conjugate acid and bases?

Last Answer : When an acid is dissolved in water it will form H3O+ ions and an anion the anion of an acid is called conjugate base and H3O+ is called conjugate acid e.g. CH3OOH + H2O H3O+ + CH3COO– Acid Base Conjugate acid Conjugate base

Description : What are reversible reaction?

Last Answer : Those reactions in which the reactants products are converted into each other under same set of conditions.

Description : What is meant by state of chemical equilibrium?

Last Answer : The state of reversible reaction, in which forward and reverse rates are equal.(Rf=Rr)

Description : What is weak electrolyte?

Last Answer : A compound which is only partially ionized in aqueous solution is called as weak electrolyte.e.g CH3COOH(Acetic aci)

Description : How would a change in pressure affect a gaseous system in equilibrium, according to Le Chatelier's principle?

Last Answer : The answer is "The equilibrium would shift to reduce the pressure change" on Apex

Description : What does the Le Chateliers principle state?

Last Answer : Feel Free to Answer

Description : Which of the following laws validates the statement that matter can neither be created nor destroyed? (1) Law of conservation of energy (2) Le Chatelier's Principle (3) Law of conservation of mass (4) Law of osmosis

Last Answer : (3) Law of conservation of mass Explanation: The law of conservation of mass, also known as the principle of mass/matter conservation, states that the mass of an isolated system (closed to all ... out, its quantity cannot otherwise change over time (hence, its quantity is "conserved" over time).

Description : Applying Le- Chatelier's principle, predict the effect of temperature and pressure on evaporation of water.

Last Answer : Ans Evaporation of water can be represented as water + heat water vapours: i) With increase in pressure- the equilibrium tend to shift in direction where there is decrease in the vol. i.e. ... left. ii) with increase in temperature- the equilibrium shifts to right as it is an endothermic reaction.

Description : If helium is introduced in a reactor containing O2 , SO2 and SO3 at equilibrium, so that total pressure increases while volume and temperature remains constant. In this case the dissociation of SO3 ( ... 's principle). (A) Decreases (B) Increases (C) Remains unaltered (D) Changes unpredictably

Last Answer : (A) Decreases

Description : he quantitative effect of temperature on chemical equilibrium is given by the (A) Van’t-Hoff equation (B) Le-Chatelier's principle (C) Arrhenius equation (D) None of these

Last Answer : (A) Van’t-Hoff equation

Description : "The rate at which a substance reacts is proportional to its active mass and the rate of a chemical reaction is proportional to the product of active masses of the reacting substances". This is the (A) Lewis- ... (B) Statement of Van't Hoff Equation (C) Le-Chatelier's principle (D) None of these

Last Answer : (D) None of these

Description : "When a system in equilibrium is subjected to a change in temperature, pressure or concentration, the equilibrium is displaced in a direction which tends to undo the effect of the change." This is ... Chatelier principle (B) Kopp's rule (C) Law of corresponding state (D) Arrhenius hypothesis

Last Answer : (A) Le-Chatelier principle

Description : "The solubility of a gas in a liquid is directly proportional to the pressure of the gas above the liquid" is a fair statem of: w) Dalton's secondary law x) Le Chatelier's solubility principle y) Henry's law z) none of the above

Last Answer : ANSWER: Y -- HENRY'S LAW

Description : Which of the following laws validates the statement that matter can neither be created nor destroyed ? (1) Law of conservation of energy (2) Le Chatelier’s Principle (3) Law of conservation of mass (4) Law of osmosis

Last Answer : Law of conservation of mass

Description : Portmanteaux le slogan publicitaire? Can you come up with a portmanteau for an advertisement slogan?

Last Answer : answer:Nightclubs – Noiseating Spam – Canvenient Pringles – Fatisfying . Can’t believe no one’s contributed to this yet. The potential answers are so not lame at all!

Description : Anyone know what kind of coffee they serve at Le Pain Quotidienne? What kind of beans? French press?

Last Answer : (Shouldn’t that be Le Pain Quotidien?) And is it a chain or can you tell us the location?

Description : What's the right sequence for the Le Carré miniseries?

Last Answer : Tinker tailor and Smileys people are both part if the same cannon however “The honourable school boy” comes between them but I don’t think they made that in to a TV series. A perfect spy is a seperate story that stands on it’s own.

Description : What does "Dans le" mean?

Last Answer : “In the…”

Description : Does anybody know if people live in Villa Stein, built by Le Corbusier?

Last Answer : Need Answer

Description : What Was Your Experience Like at Le Cordon Bleu?

Last Answer : answer:I must preface this answer by saying that my experience dates back (OMG!) 26 years, and I'm sure much has changed since then (the location, for one thing). When I went there, I was expecting ... their door than someone out of the Cordon Bleu. Having said all that, I did meet my wife there :)

Description : What did the ideas of La patrie and Le citoyen signify in the French Revolution? -SST 10th

Last Answer : These ideas symbolised ‘fatherland’ and ‘the citizens’ respectively.

Description : In France if you were served le miel what would you eat?

Last Answer : Honey

Description : What is the name that has five letters of a gun with a long barrel that name must end with le?

Last Answer : the butt

Description : tit le: Which breed of cow is profitable for milk production ?

Last Answer : Cows of improved breeds or crossbreds should be selected for milk production. Cows of these breeds can be collected from Thakurgaon , Faridpur , Jessore , Manikganj districts.

Description : my 2012 camry le radio turns on but no sound

Last Answer : Need Answer

Description : i have this le gala prom dress and how much do you think its worth.?

Last Answer : Need Answer

Description : `" if " f(x) ={ underset( 5x" "2 le x le 3) (3x+ 4,0 le x le 2),` then `int_(0)^(3) f(x) dx=?`

Last Answer : `" if " f(x) ={ underset( 5x" "2 le x le 3) (3x+ 4,0 le x le 2),` then `int_(0)^(3) f(x) dx=?` A. `(53)/(2)` B. `(55)/(2)` C. `(57)/(2)` D.

Description : `"if "f(x) ={ underset(5x, 1,2 le x le 3)(3x+4, 0 le x le 2}},` then evaluate `int_(0)^(3) f(x) dx.`

Last Answer : `"if "f(x) ={ underset(5x, 1,2 le x le 3)(3x+4, 0 le x le 2}},` then evaluate `int_(0)^(3) f(x) dx.`

Description : `"If "f(x) ={underset(x^(2)+1.2 le x le 3)(2x+1.1 le x le 2),` then evaluate `int_(1)^(3) f(x) dx.`

Last Answer : `"If "f(x) ={underset(x^(2)+1.2 le x le 3)(2x+1.1 le x le 2),` then evaluate `int_(1)^(3) f(x) dx.`

Description : No. of solutions of `16^(sin^2x)+16^(cos^2x)=10, 0 le x le 2 pi` is

Last Answer : No. of solutions of `16^(sin^2x)+16^(cos^2x)=10, 0 le x le 2 pi` is

Description : Let `cos(alpha+beta)=(4)/(5)` and let `sin(alpha-beta)=(5)/(13)`, where `0 le alpha`, `beta=(pi)/(4)`. Then`tan2alpha=`

Last Answer : Let `cos(alpha+beta)=(4)/(5)` and let `sin(alpha-beta)=(5)/(13)`, where `0 le alpha`, `beta=(pi)/(4)`. Then ... 19)/(12)` C. `(20)/(7)` D. `(25)/(16)`

Description : Let `0le theta le pi/2` `x=Xcos theta + Ysin theta` `y=Xsin theta - Y cos theta` such that `x^2+4xy+y^2=aX^2+bY^2` where `a,b` are constants such that

Last Answer : Let `0le theta le pi/2` `x=Xcos theta + Ysin theta` `y=Xsin theta - Y cos theta` such that `x^2+4xy+y^2=aX^2+ ... C. `a=3`, `b=-1` D. `theta=(pi)/(3)`

Description : Solve the following inequations `(i) (sinx-2)(2sinx-1) lt 0` `(ii) (2cosx-1)(cosx) le 0` `(iii) sinx+sqrt(3)cosx ge 1` `(iv) cos^(2)x+sinx le 2` `(v)

Last Answer : Solve the following inequations `(i) (sinx-2)(2sinx-1) lt 0` `(ii) (2cosx-1)(cosx) le 0` `(iii) sinx+sqrt(3) ... ^(2)x+sinx le 2` `(v) tan^(2)x gt 3`

Description : Solve the following equation `(i) 5cos2theta+2cos^(2)"(theta)/(2)+1=0`, `-(pi)/(2) lt theta lt (pi)/(2)` `(ii) sin7theta+sin4theta+sintheta=0`, `0 le

Last Answer : Solve the following equation `(i) 5cos2theta+2cos^(2)"(theta)/(2)+1=0`, `-(pi)/(2) lt theta ... iii) tantheta+sectheta=sqrt(3)`, `0 le theta le 2pi`

Description : Solve the following inequalities `(i) |log_(3)x|-log_(3)x-3 lt 0` `(ii)(x-1)/(log_(3)(9-3^(x))-3) le 1` `(iii)log_((x-1)/(x-5))(x-2) gt 0` `(iv) log_(

Last Answer : Solve the following inequalities `(i) |log_(3)x|-log_(3)x-3 lt 0` `(ii)(x-1)/(log_(3)(9-3^(x))-3) le 1` ... gt 0` `(iv) log_(x)(x^(3)-x^(2)-2x) lt 3`