Question

100 gms of sugar is dissolved in 420 ml of water . Find the concentration of solution in persentage . ​

Answer 1

Mass of solute = 100 g

Volume of solution = 420 ml

Mass by volume percentage =$\bold{ \frac{Mass \: o f \: solute \times 100}{Volume \: of \: solution}}$

$\frac{100 \times 100}{420} = \frac{500}{21} \%$

Answer 2

Mass of Sugar = 100 grams

Mass of Water = 420ml = 420 grams

Mass percent of sugar=

$\frac{mass \: of \: sugar}{mass \: of \: solution} \times 100$

=

$\frac{100}{420 + 100} \times 100$

=

$\frac{100}{520} \times 100$

= 19.2%

Therefore, concentration of solution is 19.2%