由硫酸钾、硫酸铝和硫酸组成的混合溶液，其pH＝1，c(Al3＋)＝0.4mol/L，c(SO42—))＝0.8mol/L，则c(K＋)为( )。
| A．0.15mol/L | B．0.2 mol/L |
| C．0.3mol/L | D．0.4mol/L |
相关试题
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| A．a; 不填 | B．the; 不填 | C．the; an | D．a ; the |
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| A．as a result of | B．on top of | C．in front of | D．in need of |
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| A．other | B．others | C．one | D．ones ks |
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| A．continued | B．immediate | C．careful | D．general |
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