Which is used to compute the change in percent for a given number of periods? Per_change, percent_change, pct_change, per_chng
Answers
(a) Solubility of potassium nitrate at 100 g of water contains potassium nitrate = 62 g 50 g of water contains potassium nitrate Thus, 31 g potassium nitrate would be needed to produce a saturated solution of potassium nitrate in 50 g of water at 313 K.
(b) When a saturated solution of potassium chloride at 353 K is cooled, the solubility potassium chloride in water decreased. As a result the amount of potassium chloride which exceeds its solubility at lower temperature separates out as crystals.
(c) The maximum amount of the salt which is dissolved in 100 g of water to form a saturate solution at the given temperature is known as solubility. Solubility of potassium nitrate at Solubility of sodium chloride at Solubility of potassium chloride at Solubility of ammonium chloride at From the above data it is clear that ammonium chloride has the highest solubility at 293 K
(d) In general the solubility of a salt increases with temperature. The increase is however different for different salts. For example the solubility of potassium nitrate increase appreciably that of ammonium chloride increases slightly that of potassium chloride increases marginally while that of sodium chloride almost remains constant.