Expt. #20 Pre-lab Q4 Consider the following reaction: 2 A + 3 B 2 A 2 B 6 The in

Question

Expt. #20 Pre-lab Q4

Consider the following reaction:

2 A + 3 B2    A2B6

The initial concentrations of A and B2 are   0.125   M and   0.760   M, respectively, with no A2B6 initially present. When the reaction comes to equilibrium, the concentration of A2B6 is found to be   3.00×102   M.

Part A

What is the equilibrium concentration of A?

Round your answer to 3 significant figures.

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Part B

What is the equilibrium concentration of B2?

Round your answer to 3 significant figures.

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Part C

What is the value of the equilibrium constant?

Round you answer to 3 significant figures.

Explanation / Answer

Part A

Equilibrium concentration of A = (0.125-0.03)/2 = 0.0475 M

Part B

Equilibrium concentrtion of B2 = (0.760 - 0.03)/3 = 0.2433 M

Part C

Equilibrium constant

K = [A2B6]/[A]2*[B2]3 = 0.03/(0.002256)*(0.0590) = 225.3876

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