Question

2.5%新洁尔灭配成0.1%新洁尔灭怎么配...急,

Answer 1

设原有1L2.5%的液体,增加水X克后浓度为0.1%,得

0.1%(1+X)=1*2.5%

解得X=24

∴比例为1:24.