What was the mistake committed by the student in the following case: A student was trying to make copper(II)sulphate crystals from copper(II)oxide and dilute sulphuric acid, instead of blue crystals,...

What was the mistake committed by the student in the following case:

A student was trying to make copper(II)sulphate crystals from copper(II)oxide and dilute sulphuric acid, instead of blue crystals, his final product was a white compound. What mistake did the student make?

a. adding excess copper (II) oxide

b. heating the filtrate to dryness

c. using concentrated sulphuric acid instead of dilute sulphuric acid

d. using excess dilute sulphuric acid

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Copper oxide reacts with sulfuric acid to form copper sulfate. The color of copper sulfate is dependent on the degree of hydration. The blue crystals of copper sulfate that are usually seen are crystals of the pentahydrate...

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