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【简答题】阅读理解。 Have you ever had problems in your life and don't know how to be happy? If so, you will find Being a Happy ager written by an Australian writer Andrew Matthews useful. In his book, Matthews ...
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【单选题】20mol/L HCl 与 0.30mol/L Na 2 CO 3 溶液等体积混合 , 该溶液的 pH 为( )。 (H 2 CO 3 的 pKa 1 = 6.38, pKa 2 = 10.25)
A.
9.95
B.
4.45
C.
10.25
D.
10.55
【单选题】20mol/L HCl 与 0.30mol/L Na 2 CO 3 溶液等体积混合 , 该溶液的 pH 为( )。 (H 2 CO 3 的 pKa1 = 6.38, pKa2 = 10.25)
A.
9.95
B.
4.05
C.
10.25
D.
10.55
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