The weight per cent of sucrose (formula weight =342 g mol -1 ) in an aqueous solution is 3.42. The density of the solution is 1 g mL -1, the concentration of sucrose in the solution in mol L -1 is

Question

The weight per cent of sucrose (formula weight =342 g mol -1 ) in an aqueous solution is 3.42. The density of the solution is 1 g mL -1, the concentration of sucrose in the solution in mol L -1 is (A) 0.01 (B) 0.1 (C) 1.0 (D) 10

Tardigrade Admin · Accepted Answer

Given, Weight of sucrose =(3.42/100)=0.0342 g Molar mass of sucrose =342 g Mass of solution =100 g Density of solution =1 g mL -1 ∴ No. of moles of sucrose =(0.0342/342) Also, density =( text Mass / text Volume ) ∴ Volume =(100/1)=100 mL Concentration of solution is calculated in terms of molarity Molarity =( text No. of moles of sucrose / text Vol. of solution in litres ) =(0.0342/(100)1000)=(0.0342/100) × 1000=0.1 mol / L

Q. The weight per cent of sucrose (formula weight =342gmol−1 ) in an aqueous solution is 3.42. The density of the solution is 1gmL−1, the concentration of sucrose in the solution in molL−1 is

0.01

0.1

1.0

10

Q. The weight per cent of sucrose (formula weight $= 342 g m o l^{- 1}$ ) in an aqueous solution is $3.42$ . The density of the solution is $1 g m L^{- 1}$ , the concentration of sucrose in the solution in $m o l L^{- 1}$ is