Question

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

Answer 1

Answer:

mass of solvent + mass of solute

mass of water + mass of substance

18 + 2 gram

=20 gram

Answer 2

$\huge\sf\underline{\pink{A}\blue{N}\red{S}\purple{W}\orange{E}\green{R}}$

$\sf{Mass \:percent \:of \:solute =\frac{ mass \:of \:solute}{mass \:of \:solution}</p><p> ×100}$

$\sf{Mass \:of \:solute =>2\: g}$

$\sf{Mass\: of \:solvent => 18\: g}$

$\sf{Mass\: of\: solution =>20\: g}$

MASS OF SOLUTE+MASS OF SOLVENT=>20

$\sf{∴ Mass \:percent \:of \:solute =>\frac{2}{20} ×100}$

$\sf=>10$%