Question

Question 3 (a)
Pragya tested the solubility of three different substances at different temperatures and collected the data as given below (results are given in the following table, as grams of substance dissolved in 100 grams of water to form a saturated solution).

a. What mass of potassium nitrate would be needed to produce a saturated solution of potassium nitrate in 50 grams of water at 313 K?

Answer 1

For answering this question, you should know what is solubility, saturated solution and variation of solubility with temperature.
a. Since 62 g of potassium nitrate is dissolved in 100 g of water to prepare a saturated solution at 313 K, so, 31 g of potassium nitrate should be dissolved in 50 g of water to prepare a saturated solution at 313 K.