When 100 cm3 of a saturated solution of KCIO3 at 40oC is evaporated, 14 g of the salt is recovered what is the solubility of KCIO3 at 40oC? [KCIO3 = 122.5]
a
11.42 mol dm-3
b
8.80 mol dm-3
c
1. 14 mol dm-3
d
0.88 mol dm-3
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HORLA1981
4 years ago
Amount of salt (KClO3) in 100 cm^3 (100 mL) = 14 g
Molar mass of KClO3 = 122.6 g/mol
Number of moles in 100 cm^3 = 14/122.6 = 0.1142
So number of moles in 1000 cm^3 = 1.142
Solubility of KClO3 = 1.142 mol/dm3
( Note :1 dm^3 = 1000 cm^3)
