APFIVE Calculating Equilibrium Concentrations
The reaction A + B ⇌ C + D has $$K_c = 8.50$$ at a certain temperature. Initially, a 1.0 L vessel contains 0.300 M A, 0.400 M B, 0.100 M C, and 0.200 M D. After the system reaches equilibrium, what is the concentration of species A?
A
0.300 M
B
0.084 M
C
0.125 M
D
0.225 M
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