solution, solvent, solule. and residue. Pragya tested the solubility of three different substans different temperatures and collected the data as given (results are given in the following table, as grams of sub dissolved in 100 grams of water to form a saturated solu Substance Dissolved Temperature in R 283 293 313 Solubility 333 21 32 62 106 1 Potassium nitrate Sodium chloride Potassium chloride 35 36 36 37 3 35 35 40 46 5 Ammonium chloride 24 87 41 55 (a) What mass of potassium nitrate would be needed produce a saturated solution of potassium nitrate 50 grams of water at 313 K? (b) Pragya makes a saturated solution of potassium chlon a in water at 353 K and leaves the solution to cool at ro temperature. What would she observe as the solut cools? Explain (c) Find the solubility of each salt at 293 K. Which salth the highest solubility at this temperature? What is the effect of change of temperature on ti (d) solubility of a salt?
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Good evening
(a) At 313 K 62 g of potassium nitrate dissolved in 100 g of water. So to produce a saturated solution of potassium nitrate in 50 g of water we need
100
62
×50=31 g of potassium nitrate.
(b)Some soluble potassium chloride will separate out in the form of crystal at room temperature because the solubility of potassium chloride will decrease.
(c)
(i) Solubility of Potassium nitrate at 293 K is 32 g.
(ii) Solubility of sodium chloride at 293 K is 36 g.
(iii) Solubility of Potassium chloride at 293 K is 35 g.
(iv) Solubility of Ammonium chloride at 293 K is 37 g.
The solubility of Ammonium chloride is highest at this temperature.
(d)The solubility of salt increases with the increase in temperature.