①所需浓硫酸的体积=m前/ρ前=1L×2mol/L×98g/mol÷98%÷1.84g/cm3≈108.696ml②所需水的体积=m水/ρ水=(m后-m前)/ρ水= (1.2g/cm3×1000ml-1.84g/cm3×108.696ml)÷1g/cm3=1000ml
