Question

Which is more concentrated? 20g of an alkali in 50ml of solution or 10g of the same alkali in 500ml of solution. Show your working.

Answer 1

$\therefore 20g \: of \: alkali \: in\: 50 ml \: solution \: is \: more \: concentrated.$

Concentration of alkali in 250 ml in percentage :-

$= \frac{20}{50} \times 100 = 40\%$

Concentration of alkali in 500ml in percentage :-

$= \frac{10}{500} \times 100 = 2%$