Question

A solution is prepared by dissolving 12g of sodium chloride in 150g of water. Calculate the mass percentage of the solution​

Answer 1

Understanding the question: This question says that we have to calculate the mass percentage of the solution is the solution is prepared by dissolving 12 grams of sodium chloride in 150 grams of water. Let's solve this question!

Given that:

⋆ Sodium chloride = 12 grams

⋆ Water = 150 grams

To calculate:

⋆ The mass percentage of the solution.

Solution:

⋆ The mass percentage of the solution = 3.61 percentage

Using concept:

⋆ The formula to find out the mass percentage of the solution.

Using formula:

${\small{\underline{\boxed{\sf{\star \: Mass \: percentage \: = \dfrac{Mass \: of \: solute}{Mass \: of \: solution} \times 100}}}}}$

Full solution:

~ Firstly let's recall what is given!

→ Mass of solute(sodium chloride) = 12 grams

→ Mass of solvent(water) = 320 g

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~ Now let's find mass of solution!

→ Mass of sodium chloride + Mass of water

→ Mass of solute + Mass of solvent

→ 12 g + 320 g

→ Mass of solution = 332 grams

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~ Now let's find the mass percentage of the solution by using suitable formula!

$:\implies \sf Mass \: percentage \: = \dfrac{Mass \: of \: solute}{Mass \: of \: solution} \times 100 \\ \\ :\implies \sf Mass \: percentage \: = \dfrac{12}{332} \times 100 \\ \\ :\implies \sf Mass \: percentage \: = \dfrac{1200}{332} \\ \\ :\implies \sf Mass \: percentage \: = \dfrac{600}{166} \\ \\ :\implies \sf Mass \: percentage \: = \dfrac{300}{83} \\ \\ :\implies \sf Mass \: percentage \: = 3.61 \: \%$