Question

A solution is prepared by add 2 g of a substance a to 18 g of water . calculate the mass per cent of the solute

Answer 1

"The mass percentage of a component of a solution is given by the following relation;

Mass percentage of the component=(mass of the component in the solution/mass of solution) x 100

Here, mass of the component in the solution= 2g

And, mass of the solution= 2+18= 20 g

According to the formula,

Mass percentage of the component=(mass of the component in the solution/mass of solution) x 100

=(2/2+18)x 100

=(2/20)x100

=10%

"

Answer 2

Answer is in Attachment !