Question

shifts equilibrium in one direction
question 12 (1 point)
when the equilibrium constant is very small, the approximate concentration of
reactant at equilibrium is ______ the initial concentration.

greater than
less than
the same as
exactly 100 times
exactly 1 000 times
question 13 (1 point)
a reaction quotient is calculated to be 3.2 x 10⁻⁵. the equilibrium constant for the
same reaction is 5.4 x 10⁻⁵. which statement is correct?

the system is at equilibrium.
the concentrations of the products are greater than their concentrations at
equilibrium.
the system will attain equilibrium by moving to the right.
the system will attain equilibrium by moving to the left.
the rate of the forward and reverse reactions are different at equilibrium.

Explanation:

• Question 12:
• The equilibrium constant \(K=\frac{[products]}{[reactants]}\). When \(K\) is very small, it means \(\frac{[products]}{[reactants]}\) is small. So, the concentration of reactants at equilibrium is close to the initial concentration of reactants. In other words, the approximate concentration of reactant at equilibrium is the same as the initial concentration.
• Question 13:
• The reaction quotient \(Q = 3.2\times10^{-5}\) and the equilibrium constant \(K=5.4\times 10^{-5}\). Since \(Q

Answer:

• Question 12: the same as
• Question 13: The system will attain equilibrium by moving to the right.