pH=3和pH=5的两种盐酸以1∶2体积比混合,该混合溶液的pH值为_其他解答

pH=3和pH=5的两种盐酸以1∶2体积比混合,该混合溶液的pH值为

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解答

pH = 3 ==> [H+]= 0.001 M; [H+] = 0.001/3 =0.00033 MpH = 5 ==> [H+] = 0.00001 M[H+] = 0.00001x2/3 =0.0000066 M[H+](total) = 0.00033 + 0.0000067MpH =3.47