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 reactionA+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
Explanation / Answer
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