Question

How many liters of water should be added to 20 liters of 40% solution of acid to

Answer 1

The amount of liters of water that should be added to 20 liters of 40% solution of acid to obtain 30% solution is:  6.7 Liters.

Liters of water needed

Acid = 0.4× 20

Acid = 8 liters

Water = 0.6× 20

Water = 12 liters

Acid/(Acid+Water)

A / (A + W) = 0.30

8 / (8 + W) = 0.30

2.4 + 0.3W = 8

0.3W = 8 - 2.4

0.3W= 5.6

Divide both side by 0.3W

W=5.6/0.3

W=18.7 Liters

18.7 - 12 = 6.7 Liters (Amount of water that must be added)

Therefore the amount of liters of water that should be added to 20 liters of 40% solution of acid to obtain 30% solution is:  6.7 Liters.

Learn more about Liters of water needed here: brainly.com/question/23918882

#SPJ1