How could one rapidly separate red #40 from zinc oxide? indicate every step.

Question

Chemistry

Kathleen Stephenson

29 September, 16:13

How could one rapidly separate red #40 from zinc oxide? indicate every step.

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Answers (1)

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Deborah Haney · Answer 1

Red #40 is soluble in water while zinc oxide is not.

So the easiest way to separate them is as follows:

1 - add water to the mixture until red #40 is dissolved in the water

2 - filter to separate the zinc oxide

4 - heat the solution of red #40 and water until water evaporates and red#40 remains.