Question

Ba(OH)2 Ba+2 + 2 OH- (dissolved in solution). Which will NOT happen to the equilibrium of this solution as H+ ions are added? H+ will combine with OH- to form water. The base will dissociate to form more OH-. The reaction will move to the right. The reaction will move to the left. The quantity of Ba(OH)2 will decrease.

Answer 1

Answer:

The reaction will move to the left.

Explanation:

• For the reaction:

Ba(OH)₂ = Ba²⁺ + 2OH⁻,

Ba(OH)₂ is dissociated to Ba²⁺ and 2OH⁻.

• If H⁺ ions are added to the equilibrium:

H⁺ will combine with OH⁻ to form water.

So, the concentration of OH⁻ will decrease and the equilibrium is disturbed.

According to Le Châtelier's principle: when there is an dynamic equilibrium, and this equilibrium is disturbed by an external factor, the equilibrium will be shifted in the direction that can cancel the effect of the external factor to reattain the equilibrium.

• So, the reaction will move to the right to suppress the effect of decreasing OH⁻ concentration.

• The base will dissociate to form more OH⁻ and thus, the quantity of Ba(OH)₂ will decrease.

So, the right choice is: the reaction will move to the left, is the choice that will not happen to the equilibrium.