摘要：例1.有镁.铝的混合粉末10.2g.将它溶于500mL,4mol?L?1的盐酸中.若要得到沉淀量为最大值.则需加入2mol?L?1的NaOH溶液的体积为 A.300mL B.500mL C.1000mL D.1500mL [解析]:有关反应为:Mg+2HCl = MgCl2+H2↑ 2Al+6HCl = 2AlCl3+3H2↑ HCl+NaOH=NaCl +H2O MgCl2+2NaOH =Mg(OH)2↓ +2NaClAlCl3+3NaOH = Al(OH)3↓+3NaCl

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