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pH of Salts

Solubility of...

Question

Solubility of $N a C l$ , $N a_{2} S O_{4}$ and $N a_{3} P O_{4}$ in water in increasing order is :

N a C l < N a_{2} S O_{4} < N a_{3} P O_{4}

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N a_{3} P O_{4} < N a_{2} S O_{4} < N a C l

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N a C l < N a_{3} P O_{4} < N a_{2} S O_{4}

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N a_{2} S O_{4} < N a C l < N a_{3} P O_{4}

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Solution

The correct option is A $N a_{3} P O_{4} < N a_{2} S O_{4} < N a C l$
As size of ions increases, hydration energy decreases. So, sulphate and phosphate have low hydration energy and NaCl have highest solubility among all.

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