实验室常用溶质质量分数为98%的浓硫酸(密度1.84g⼀cm3)来配制需要用的较稀的硫酸溶液.现要配制500mL溶

2024-12-17 01:53:13
推荐回答(1个)
回答1:

设浓硫酸的体积为x,500mL=500cm3
x?1.84g∕cm3×98%=500cm3×1.14g/cm3×20%
x=63.2cm3=63.2mL
加水的体积为:(500cm3×1.14g/cm3-63.2cm3×1.84g/cm3)÷1g/cm3=453.7cm3=453.7mL
答:需要63.2mL浓硫酸,需要加水453.7mL.