Question

A solution is prepared by adding 2g of a substance A to 18 g of water. Calculate the mass percentage of the solute? ​

Answer 1

$\huge\mathfrak{Solution}$

• Mass of solute = 2g

• Mass of solvent = 18g

• Mass of solution = Mass of solute + mass of solvent

= 2+18 = 20g

• Mass percentage of A = Mass of A * 100/ Mass of solution = 2*100/20 = 10%

= 10%

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Answer 2

Solution :

• Mass of solute = 2g
• mass of solvent (water) = 18g

we need to find the mass Percent of solute

$\pink{\boxed{ \underline{\overline{\rm \: \mid \: Mass \% of \: solute = \frac{Mass \: of \: solute}{mass \: of \: Solution} \times 100 \mid}}}}$

Mass of solute = 2g

Mass of Solution = 2g + 18g

Mass of Solution = 20g

Mass % of solute = 2g/20g × 100

Mass % of solute = 2 × 5

Mass % of solute = 10%

Hence,

• Mass percent of solute is 10%

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