Question

value: 3
when the concentration of a reactant is ___, the chemical equilibrium is shifted towards the right, the product side of
the chemical equation.

a. decreased

b. increased

c. kept the same

d. evaporated

Explanation:

According to Le Chatelier's principle, when the concentration of a reactant is increased, the system will try to counteract this change by favoring the reaction that consumes the reactant, which is the forward reaction (shifting equilibrium to the product side, right). If reactant concentration is decreased, equilibrium shifts left. Keeping it same or evaporating (not a concentration change in the relevant sense here) don't shift it right.

Answer:

b. increased