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Synthesis of Phenols II

"Calcium and ...

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"Calcium and barium bicarbonates are stable only in solution and decompose on removal of water to give carbonates."
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Solution

Calcium and barium bicarbonates are stable only in solution and decompose on removal of water to give carbonates.
This is beacuse because the close approach of a cation and anion in the crystalline salt causes the decomposition of bicarbonate ion.
$C a (H C O_{3})_{2} ⟶ C a C O_{3} + C O_{2} + H_{2} O$ (upon heating)

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