A.溶液pH值即為溶液中氫離子濃度的對數(shù)值 B.溶液pH值即為溶液中氫離子濃度的負對數(shù)值 C.溶液pH值即為溶液中酸濃度的負對數(shù)值 D.溶液pH值即為溶液中堿濃度的負對數(shù)值
A.相等 B.不相等 C.氨水溶液大 D.NaOH溶液大
A.4.5% B.9% C.18% D.90%