helper8618 helper8618

21-05-2018
Chemistry

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How many liters of whater must be added to 20l of a 75% acid solution toproduce a solution that is 15% acid?

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emchemwhiz emchemwhiz

21-05-2018

80 liters of water

this is a mixture problem.
75% x 20 = 1500 (acid solution)
0 x X = 0 (water)
15 x 20+x = 300 + 15x

looking at column 3, we get 1500+0 = 300+15x
using properties, x=80

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