Question

To which colour does the colour of solution changes of zinc zinc sulphate when magnesium is added to it

Answer 1

Zinc is more reactive than iron. Hence, it would displace iron from ferrous sulphate to form zinc sulphate. The pale green color of iron(II) sulphate will fade away due to the formation of zinc sulphate. Iron will get deposited at the bottom of the test tube. The reaction is exothermic in nature.

Answer 2

When magnesium is placed in copper sulfate solution a redox reaction occurs, causing copper metal to form on the magnesium and the deep blue colour of the solution pales.

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