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Question

In order to determine solubility of sodium iodide (NaI), 150g of saturated solution of sodium iodide(NaI) is evaporated to dryness at 250C. At this stage 90 g of NaI is obtained. Find the solubility of NaI in water at 25C.

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Solution

Weight of saturated solution = 150 g

Weight of NaI = 90 g

Weight of water = (Weight of saturated solution) - (Weight of NaI)

= 150 - 90 = 60 g

Solubility of NaI = Weight of NalWeight of Water×100

9060×100 150g


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