1.

30 g of glucose and 20 g common saltis dissolved in 500 mL of water to makea solution. Calculate the concentration of (a) glucose and (b) common salt in termsof mass by mass percentage of the solution. (Density of water = 1 g/mL)

Answer»

Solution :DENSITY of water = 1 g/mL
`THEREFORE` Mass of water (solvent) = 500 g
Mass of solute (glucose) = 30 g
Mass of solute (COMMON salt) = 20 g
Mass of solution = (30 + 20 + 500)g = 550 g
(a) Mass percentage of solution for glucose
= `("Mass of solute (glucose)")/("Mass of solution")xx100`
= `30/550xx100`
= 5.45%
(B) Mass percentage of solution for common salt
= `("Mass of solute (common salt)")/("Mass of solution")xx100`
= `20/550xx100`
= `3.64%`


Discussion

No Comment Found

Related InterviewSolutions