A+B?C+D K c=[C][D][A][B]=4.0 Part A Initially, only A and B are present, each at

ID: 807924 • Letter: A

Question

A+B?C+D

Kc=[C][D][A][B]=4.0

Part A

Initially, only A and B are present, each at 2.00 M. What is the final concentration of A once equilibrium is reached?

Express your answer to two significant figures and include the appropriate units.

0.67 M

Correct

Part B

What is the final concentration of D at equilibrium if the initial concentrations are [A] = 1.00M and [B] = 2.00M

The reversible chemical reaction

A+B?C+D

has the following equilibrium constant:

Kc=[C][D][A][B]=4.0

Part A

Initially, only A and B are present, each at 2.00 M. What is the final concentration of A once equilibrium is reached?

Express your answer to two significant figures and include the appropriate units.

[A] =

0.67 M

Correct

Part B

What is the final concentration of D at equilibrium if the initial concentrations are [A] = 1.00M and [B] = 2.00M

initial concentration

[A] = [B]=2

[C] =[D] = 0

At equilbrium

[A] = 4-x = [B]

[C] = x = [D]

4-x = 0.67

so x = 3.33

so [C] = [D] = 3.33

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