120.0 g of KCl is added to 200 g of water at 40o C and then thoroughly mixed. Wh

Question

120.0 g of KCl is added to 200 g of water at 40o C and then thoroughly mixed. Which of the following statements is true? a. … the solution is saturated and no solid precipitate is observed b. … the solution is saturated and solid precipitate is observed. c. … the solution is unsaturated and no solid precipitate is observed. d. … the solution is unsaturated and solid precipitate is observed. e. ….the solution is supersaturated and no solid precipitate is observed. f. … the solution is supersaturated and solid precipitate is observed.

Explanation / Answer

Solubility of KCl in water at 40°C is 40.3 g / 100g water

Therefore, at 40°C 200g of water can dissolve 80.6 g of KCl.

Out of 120g only 80.6g will dissolve.

So, the answer is f. … the solution is supersaturated and solid precipitate is observed

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