Question

How much pure acid is in 440 milliliters of a 19% solution

Answer 1

83.6 mL

Explanation:

Given 440 mL of 19% acid solution. This means the whole volume of this acid solution is 100%. Let x mL be the volume of pure acid in this solution.

Then

`440\ mL - 100\%\\ \\x\ mL - 19\%`

Write a proportion:

`(440)/(x)=(100)/(19)`

Cross multiply:

`100\cdot x=440\cdot 19\\ \\x=(440\cdot 19)/(100)\\ \\x=(8,360)/(100)\\ \\x=83.60\ mL`