Question

what is the concentration of sugar in sucrose if it's 20gm. are dissolved in enough water to make a final volume up to 2L​

Answer 1

the concentration of solution is 0.029 M

Explanation:

Given

mass of sucrose = 20 g

final volume = 2 L

concentration of sugar = ??

Solution

as we know that in sugar the ratio is

C : H : O :: 12 :22 : 11

and molar mass will be

molecular weight of the sugar = 12 x 12 + 22 x 1 + 11 x 16

molecular weight of the sugar = 342 g/ mol

No. of Moles = Given mass/ Molecular mass

No. of Moles =  20 / 342

No. of Moles = .058 moles

the solution contains 2 liters,

then the concentration of solution is .058 / 2 = 0.029 mol / L

or 0.029 M