Home > Chemistry > Chemical Reactions and Equations

Why does copper sulfate pentahydrate change colour upon heating?

Answer 1

Because a chemical reaction has taken place, colour change is the prime means to determine the fact of chemical change (of course there are chemical reactions that proceed WITHOUT colour change).

Additionally, the following chemical equation can be used to depict this reaction:

#underbrace(CuSO_4*5H_2O(s))_"beautiful blue"+Delta rightleftharpoons underbrace(CuSO_4(s))_"white salt" + 5H_2O(g)uarr#

Since copper sulfate and copper sulfate pentahydrate are distinct and different from one another, the salts should have different characteristics and colors, which they do.

By signing up, you agree to our Terms of Service and Privacy Policy

Answer 2

Mateo Aguilar

Heating causes copper sulfate pentahydrate to lose its water molecules and change color into anhydrous copper sulfate, which is a different color.

By signing up, you agree to our Terms of Service and Privacy Policy

Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.