Published 12.05.2018 on subject Chemistry by Guest

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

Answered by Guest

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.