Question

Kushagra dropped a crystal of copper sulphate into a beaker of hot water and cold water each
and observed carefully.
(i) What would he observe as the time passes?
(ii) Does the rate of mixing change with temperature? Why and how?

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Answer 1

Answer:

When the crystals ae added in a glass of cold and hot water:

i) As the time passes, the hot water becomes blue/purple and in cold water, no appreciable color change is observed because of less dissolution of crystals.

ii) Rate of mixing increases as the kinetic energy of particles depends on temperature and increases with the increase of temparture.