Question

98%浓硫酸稀释成200ml4mol/L的稀硫酸,需要多少体积的浓硫酸,

Answer 1

n=cV

200mL,4mol/L,

n(H2SO4)=0.8mol,

m=nM

m(H2SO4)=78.4g

V=m/ρ

78.4g,浓硫酸密度1.84g/mL

V=42.6mL