在Al2(SO4)3,K2SO4,KAl(SO4)2的混合溶液100ml中,如果SO4^2-的浓度等于0.4mol/L,当加入2mol/L的K0H溶液50ml时,生成沉淀恰好溶解,则原混合物中K+的物质的量浓度是 ( B ) A.0.2mol/L B.0.05mol/L C.0.45mol/L D.0.225mol/L
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![在Al2(SO4)3,K2SO4,KAl(SO4)2的混合溶液100ml中,如果SO4^2-的浓度等于0.4mol/L,当加入2mol/L的K0H溶液50ml时,生成沉淀恰好溶解,则原混合物中K+的物质的量浓度是 ( B ) A.0.2mol/L B.0.05mol/L C.0.45mol/L D.0.225mol/L](/uploads/image/z/4816155-3-5.jpg?t=%E5%9C%A8Al2%28SO4%293%2CK2SO4%2CKAl%28SO4%292%E7%9A%84%E6%B7%B7%E5%90%88%E6%BA%B6%E6%B6%B2100ml%E4%B8%AD%2C%E5%A6%82%E6%9E%9CSO4%5E2-%E7%9A%84%E6%B5%93%E5%BA%A6%E7%AD%89%E4%BA%8E0.4mol%2FL%2C%E5%BD%93%E5%8A%A0%E5%85%A52mol%2FL%E7%9A%84K0H%E6%BA%B6%E6%B6%B250ml%E6%97%B6%2C%E7%94%9F%E6%88%90%E6%B2%89%E6%B7%80%E6%81%B0%E5%A5%BD%E6%BA%B6%E8%A7%A3%2C%E5%88%99%E5%8E%9F%E6%B7%B7%E5%90%88%E7%89%A9%E4%B8%ADK%2B%E7%9A%84%E7%89%A9%E8%B4%A8%E7%9A%84%E9%87%8F%E6%B5%93%E5%BA%A6%E6%98%AF+%28+B+%29+A.0.2mol%2FL+B.0.05mol%2FL+C.0.45mol%2FL+D.0.225mol%2FL)
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