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What happens if a drop of water is poured over anhydrous copper sulphate |
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Answer» sulphate is CU SO₄ is a salt of copper.The anhydrous copper sulphate without any moist or WATER molecules in it - is a light GREENISH white powder. When a water drop falls on the anhydrous powder, water molecules are absorbed by the sulphate.The pentahydrate form CuSO₄ . 5 H₂O of copper sulphate is a beautiful bright shining blue crystalline solid.Copper sulphate exists in various degrees of HYDRATION ie., different number of molecules of water associated with one molecule of copper sulphate: like trihydrate and heptahydrate - which is green.Cu SO₄ dissolves in a lot of water (not just drops) giving out heat, and FORMS [ Cu (H₂O)₆ ]²⁺ and SO₄²⁻ ions. Cu SO₄ + 5 H₂O ==> ( Cu SO₄. 5 H₂O ) + heat Cu SO₄ + 6 H₂O ==> Cu (H₂O)₆²⁺ + SO₄²⁻ + heat aqua |
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