Calculate the molality of the aquaeous sol'n? 1.22 molarity of C12 H22 O11 sol'n whose density is 1.12g/m?
Answer:
1.12 g/mL means that 1 mL weights 1.12 g
1000 mL ( 1 L ) weight 1120g
1.22 M means 1.22 moles C12H22O11 in 1 L of solution
Molecular weight = 342 g/mol
1.22 mol x 342 g/mol = 417.2g grams of C12H22O11 in 1120 g of solution.
Mass water = 1120 - 417.2 = 702.8 g = 0.7028 Kg
m = 1.22 / 0.7028 = 1.73 m
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