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Paper Topic:

QUIZ

Question 1

Consider the reactions of cadmium with the thiosulfate anion

Cd2 (aq S2O32- (aq " Cd (S2O3 (aq ) K1 8 .3 ? 103

Cd (S2O3 (aq S2O32- (aq " Cd (S2O3 )22- (aq ) K2 2 .5 ? 102

What is the value for the equilibrium constant for the following reaction

Cd2 (aq 2S2O32- (aq " Cd (S2O3 )22- (aq (a ) 0 .030 (b )33 (c )8 .1 X 10 TO THE THIRD POWER (d )8 .6 X 10 TO THE THIRD POWER (e )2 .1 x 10 TO THE SIXTH POWER

Question 2

Stearic acid , natures

most common fatty acid , dimerizes when dissolved in hexane

2C17H35COOH (C17H35COOH )2 DH ?rxn -172 kJ

The equilibrium constant for this reaction at 28 ?C is 2900 . Estimate the equilibrium constant at 38 ?C (a )4 .7 ? 10 TO THE FIFTH POWER (b )2 .6 ? 10 TO THE FOURTH POWER (c )1 .9 ? 10 TO THE THIRD POWER (d )3 .2 ? 10 TO THE SECOND POWER (e )18

Question 3

The reaction system

CS2 (g 4H2 (g " CH4 (g 2H2S (g

is at equilibrium . Which of the following statements describes the behavior of the system if the partial pressure of hydrogen is doubled (a ) As equilibrium is reestablished , the partial pressure of carbon disulfide increases (b ) As equilibrium is reestablished , the partial pressure of methane CH4 , decreases (c ) As equilibrium is reestablished , the partial pressure of hydrogen decreases (d ) As equilibrium is reestablished , the partial pressure of hydrogen sulfide decreases (e ) As equilibrium is reestablished , all the partial...

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