Question

Which description is true of 0.02 M Ca(OH)2 if Ca(OH)2 completely dissociates in water? A. It’s a dilute strong acid. B. It’s a dilute strong base. C. It’s a dilute weak base. D. It’s a concentrated weak base. E. It’s a concentrated weak acid.

Answer 1

Answer:- B. It's a dilute strong base.

Explanations:- The given concentration of calcium hydroxide is 0.02 M which is low means it is diluted. It has hydroxide ions which means it's a base. If it dissociates completely then it's a strong base. The dissociation equation is written as:

`Ca(OH)_2(aq)\rightarrow Ca^+^2(aq)+2OH^-(aq)`

So, the correct option is B) It's a dilute strong base.