A laboratory technician needs to make a 108 -liter batch of a 20 % acid solution. how can the laboratory technician combine a batch of an acid solution that is pure acid with another that is 10 % to get the desired concentration?

Question

Nixon

Chemistry

10 January, 14:58

A laboratory technician needs to make a 108 -liter batch of a 20 % acid solution. how can the laboratory technician combine a batch of an acid solution that is pure acid with another that is 10 % to get the desired concentration?

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Answers (1)

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Chance Mueller · Answer 1

The answer to this question would be:

100% solution = 12 liter

10% solution = 96 liter

In this question, you have 2 kinds of a solution with different concentration and try to make the third solution. To answer this question, you need to understand that you need to match the amount of the molecule. You can get the amount of molecule by multiplying the concentration with the volume.

The calculation would be:

volume1+volume2 = volume3

volume1 + volume2 = 108l

volume1 = 108l - volume2

amount1 + amount 2 = amount3

volume1 * concentration1 + volume2 * concentration2 = volume3 * concentration3

volume1 * 100% + volume2 * 10% = 108 liter * 20%

volume1 + 1/10 volume2 = 21.6 liter

(108liter - volume2) + 1/10 volume2 = 21.6liter

108liter - 9/10 volume2 - 21.6liter

108liter - 21.6 liter = 9/10 volume2

9/10 volume2 = 86,4 liter

volume2 = 96liter

volume1 = 108liter - volume2

volume1 = 108 liter - 96 liter = 12 liter