D2L4_Answers

D2L4_Answers - Answer Key for D2L Assignment #4 Consider...

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Answer Key for D2L Assignment #4 Consider the reactions of cadmium with the thiosulfate anion. Cd 2+ ( aq ) + S 2 O 3 2-( aq ) Cd(S 2 O 3 )( aq ) K 1 = 8.3 × 10 3 Cd(S 2 O 3 )( aq ) + S 2 O 3 2-( aq ) Cd(S 2 O 3 ) 2 2-( aq ) K 2 = 2.5 × 10 2 What is the value for the equilibrium constant for the following reaction? Cd 2+ ( aq ) + 2S 2 O 3 2-( aq ) Cd(S 2 O 3 ) 2 2-( aq ) 1) 2.1 × 10 6 Feedback: Difficulty: M 2) 8.6 × 10 3 Feedback: Difficulty: M 3) 0.030 Feedback: Difficulty: M 4) 33 Feedback: Difficulty: M 5) 8.1 × 10 3 Feedback: Difficulty: M ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The equilibrium constant, K p , has a value of 6.5 × 10 -4 at 308 K for the reaction of chlorine with nitric oxide. 2NO( g ) + Cl 2 ( g ) 2NOCl( g ) What is the value of K c ? 1) 6.5 × 10 -4 Feedback: Difficulty: H 2) 2.5 × 10 -7
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Feedback: Difficulty: H 3) 1.7 Feedback: Difficulty: H 4) none of the above Feedback: Difficulty: H 5) 1.6 × 10 -2 Feedback: Difficulty: H ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The equilibrium constant K c for the reaction PCl 3 ( g ) + Cl 2 ( g ) PCl 5 ( g ) is 49 at 230 ° C. If 0.70 mol of PCl 3 is added to 0.70 mol of Cl 2 in a 1.00-L reaction vessel at 230 ° C, what is the concentration of PCl 3 when equilibrium has been established? 1) 0.11 M Feedback: Difficulty: H 2) 0.83 M Feedback: Difficulty: H 3) 0.049 M Feedback: Difficulty: H 4) 0.59 M Feedback: Difficulty: H 5) 0.30 M Feedback: Difficulty: H
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ At 850 ° C, the equilibrium constant K p for the reaction C( s ) + CO 2 ( 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
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D2L4_Answers - Answer Key for D2L Assignment #4 Consider...

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