a. Distinguish between acid strength and acid concentration.
b. Distinuish between weak base and an isoluble base.

Explanation

a. Concentration of an acid refers to the number of moles of acid dissolved per `L` of solution, whereas the strength is determined how completely it ionises. Both of these factors affect the `[H_(3)O^(o+)]`
b. A weak base ionise only parially whereas an insoluble base gives less `overset(Theta)OH` ions because it dissolves only slightly.