摘要:5g÷143g/mol-0.875mol n2(HCl) =0.625mol n2(HCl) =1.25mol 反应后溶液中n(HCl)=0.5L×12mol/L-3.5mol-1.25mol=1.25mol c(HCl)=1.25mol÷0.5L=2.5mol/L ⑶ 2.5mol/L
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