问题标题:
配制0.2mol/LNa2SO4溶液50mL要固体NA2SO4的质量是多少
问题描述:
配制0.2mol/LNa2SO4溶液50mL要固体NA2SO4的质量是多少
苏韬回答:
n(Na2SO4)=c(Na2SO4)×V(溶液)
=0.2mol/L×0.05L
=0.01mol
m(Na2SO4)=n(Na2SO4)×M(Na2SO4)
=0.01mol×142g/mol
=1.42g
答:XXXXXXXXX
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