$C u S O_{4} . 5 H_{2} O$ on heating produces a salt X which is white powder along with molecules of Y. Y thus produced can change the colour of blue cobalt chloride to pale pink.. What is X and Y ? Explain the chemistry behind this.

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Solution

When $C u S O_{4} . 5 H_{2} O$ is heated it loses the 5 molecules of water as they are present as water of crytstallisation.
$C u S O_{4} . 5 H_{2} O \to C u S O_{4} + 5 H_{2} O$
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These water molecules lost combines with blue coloured copper chloride and turns to pale pink.
$C o C l_{2} + 6 H_{2} O \to C o C l_{2} . 6 H_{2} O$
(Blue) (Pale Pink)
[1 Mark]
Thus X is $C u S O_{4}$ and Y is $H_{2} O$ .
[1 Mark]

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CuSO4.5H2O on heating produces a salt X which is white powder along with molecules of Y. Y thus produced can change the colour of blue cobalt chloride to pale pink.. What is X and Y ? Explain the chemistry behind this.

$C u S O_{4} . 5 H_{2} O$ on heating produces a salt X which is white powder along with molecules of Y. Y thus produced can change the colour of blue cobalt chloride to pale pink.. What is X and Y ? Explain the chemistry behind this.