Question

4. What will be the change in the colour of copper sulphate solution when magnesium is added to the
Write a balanced chemical equation for the same.​

Answer 1

Aqueous copper sulfate solution is blue from the colour of the hydrated Cu++ cations and since the sulfate anion is colourless. The colour of the copper sulfate does not change during the reaction with magnesium metal.

Answer 2

The main difference between cuprous and cupric is that cuprous is copper +1 cation whereas cupric is copper +2 cation. When copper is reacted with oxygen, two stable compounds Cu2O and CuO form. Copper Oxide is the inorganic compound with the formula CuO (Figure 1) also known as 'cupric oxide'.

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