Question

how many grams of sucrose must be added to 375grams of water to prepare 2.75% by mass solution of sucrose?​

Answer 1

Given:

mass of water = 375g

%w/w of solution = 2.75%

Formula of %w/w of a solution is given by:

(mass of solute/mass of solute + mass of solvent) x 100%

Calculation:

W sucrose/W sucrose + W water x 100%

2.75/100 = W sucrose/ W sucrose + 375

2.75 (W sucrose) + 1031.25 = 100(W sucrose)

97.25 (W sucrose) = 1031.25

W sucrose = 1031.25/97.25

= W sucrose = 10.6g.

Hence mass of sucrose solution = 10.6 g