Question

A solution contains 100g of sugar in 1000gof water. Calculate the concentration in terms of mass by mass percentage of solution. [1mark]​

Answer 1

• Mass of Solute=100g
• Mass of solvent=1000g

We know

$\boxed{\sf Mass\:of\: Solution=Mass\:of\: Solute+Mass\:of\:solvent}$

$\\ \sf\longmapsto Mass\:of\: Solution=100g+1000g=1100g$

Now

$\boxed{\sf Mass\%=\dfrac{Mass\:of\: Solute}{Mss\:of\: Solution}\times 100}$

$\\ \sf\longmapsto Mass\%=\dfrac{100}{1100}\times 100$

$\\ \sf\longmapsto Mass\%=9.09\%$