题目内容：

用Ph试纸测定某含0.1mol/L的CH3COOH和0.1mol/L CH3COONa的溶液ph

优质解答

(1)[H+] + [Na+] == [OH-] + [Ac-]
(2)[H+] == [OH-] + [Ac-] - [Na+]
(3)2[Na+] == [HAc] + [Ac-]
(4)[H+] == [OH-] + [Ac-] - ([HAc] + [Ac-])/2
(5)[H+] == [OH-] + ([Ac-] - [HAc] )/2
OK!