【正确答案】The concentration of acid in a solution is determined by how many mol of acid is dissolved per L of solution; its strength is determined by how completely it ionizes. Both of these factors affect the hydronium ion con- centration.

【正确答案】A weak base furnishes little hydroxide ion to a solution because it ionizes only partially;an insolubIe base furnishes little hydroxide ion because it dissolves only slightly.