The solubility of potassium trioxonitrate(v) is exactly
1500g per 1000g of water at 72°C and 600g per 1000g water at 50°C. Calaulate the mass of potassium trioxonitrate(v) that will crystallize
out of solution. If 135g of the Saturated solution
at 72°C is cooled to 40°C
Answers
Explanation:
(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.