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-3B. 8.80 mol dm-3C. 1. 14 mol dm-3D. 0.88 mol dm-3
Question
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-3B. 8.80 mol dm-3C. 1. 14 mol dm-3D. 0.88 mol dm-3
Solution
To find the solubility of KCIO3 at 40°C, we first need to calculate the molarity of the solution.
Step 1: Convert the mass of KCIO3 to moles. The molar mass of KCIO3 is given as 122.5 g/mol. So, the number of moles of KCIO3 is given by the mass of the KCIO3 divided by its molar mass.
Moles of KCIO3 = 14 g / 122.5 g/mol = 0.114 mol
Step 2: Convert the volume of the solution to liters. 100 cm3 is equivalent to 0.1 L.
Step 3: Calculate the molarity of the solution. Molarity is defined as the number of moles of solute per liter of solution.
Molarity = Moles of solute / Volume of solution in liters Molarity = 0.114 mol / 0.1 L = 1.14 mol/L or 1.14 mol dm-3
So, the solubility of KCIO3 at 40°C is 1.14 mol dm-3. The correct answer is C. 1.14 mol dm-3.
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