Question

A solution is prepared by adding 40 g of sugar in 100 g of water. Calculate the concentration in terms of mass by mass percentage of solution.

Answer 1

Given,
Mass of sugar= 40g
Mass of water= 100g
To find :- concentration of sugar in water
Total mass of solution = mass of sugar + mass of water=100g +40g = 140g
percentage of concentration of sugar in solution=
40/140 ×100% =200/7%=28.57% approx

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Answer 2

Answer:

Mass of solute : 40g

Mass of solution : 100g

Concentration : mass of solute + mass of solution/mass of solute

= 40 + 100/40 × 100

140/40 × 100

= 28.57%(approx)