Question

A solution is prepared by adding 2gram of substance A and 18gram of water.Calculate the Mass% of solute.

Answer 1

Our solute is the substance A which is 2 gram in quantity.

Solvent is water which is 18 gram in quantity.

Solution = Solvent + solution

Therefore. Mass of Solution = Mass of Solute + Mass of Solution

Mass % of Solute = ( Mass of Solute * 100 ) / Mass of solution

= (2*100) / (18+2)

= 200/20 =10%

So Mass % of solute is 10%