Question

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Answer 1

Answer:

Dilute acid + carbonate used in making the salt of copper sulfate.

Explanation:

In this experiment an insoluble metal oxide is reacted with a dilute acid to form a soluble salt.Copper(II) oxide, a black solid, and colourless dilute sulfuric acid react to produce copper(II) sulfate,giving a characteristic blue colour to the solution.

Answer 2

Answer: B. dilute acid + carbonate

Explanation:

An insoluble metal oxide reacts with a diluted acid in order to make a salt.

Copper (II) oxide reacts and the diluted acid react to make Copper (II) sulfate.