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Last updated date: 05th Dec 2023
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MVSAT Dec 2023

What is the color of zinc sulphate, ferrous sulphate, copper sulphate and aluminium sulphate ? When we add aluminium metal in ferrous sulphate, what is the color ? When we add aluminium metal in copper sulphate what is the color ?

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Zinc sulphate: Colorless

Ferrous sulphate: Light green

Copper sulphate: Blue

Aluminium sulphate: colorless

When Al is added to ferrous sulphate solution:

2Al + 3FeSO4 -> Al2(SO4)3 + 3Fe

Green color of the solution disappears

When Al is added to copper sulphate solution:

2Al(s) + 3CuSO4(aq) -> Al2(SO4)3(aq) + 3Cu(s)  

The green color of the solution becomes transparent