NCERT Ex Q3 - Is Matter Around Us Pure?
Question: Pragya tested the solubility of three different substances at different temperatures and collected the data as given below. Substance Dissolved Temperature in K 283 293 313 333 353 Solubility Potassium nitrate 21 32 62 106 167 Sodium chloride 36 36 36 37 37 Potassium chloride 35 35 40 46 54 Ammonium chloride 24 37 41 55 66 (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? (b) Pragya makes a saturated solution...
Answer: (a) 31 g, (b) Crystals will form, (c) Ammonium chloride, (d) Solubility increases with temperature.
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