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At 283 K a saturated solution of solid X can be prepared by dissolving 21.0 g of it in 100 g of water. The maximum amount of X which can be dissolved in 100 g of water at 313 K is 62.0 g. An attempt is made to dissolve 50.0 g of X in 100 g of water at 313 K.
Which of the above statements are correct ?

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Solubility of X decreases with increases of temperature

At 313 K 29.0 g of X will remain un dissolved

On cooling the solution of X from 313 K to 283 K less than 29.0 g of X will crystallize out

All the 50.0 g of X will dissolve at 313 K

answer is A.

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Detailed Solution

We know that solubility depends on temperature

$\to$ Generally when temperature increases, solubility also increases.

$\to$ By decreasing the temperature of the solution it acts as super saturated solution and solubility decreases.

Hence 50.0g of X will easily dissolve in 313K as the maximum amount mentioned is 62g.

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