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Hydrated and Anhydrous Substances

Calculate the...

Question

Calculate the percentage of water of crystallization in glauber's salt ${N a}_{2} {S O}_{4} . {10 H}_{2} O$

45.18%

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75.39%

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36.33%

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55.72%

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Solution

The correct option is C 55.72%

Molar mass of $N a_{2} S O_{4} .10 H_{2} O = 323$

Molar mass of water in it t is mass of $10 H_{2} O = 180$

$∴$ % of water of crystallisation $= \frac{180}{323} \times 100$

$= 55.72 %$

Therefore, option D is correct.

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