Question

If 6 g of NaCl is dissolved in 100. g of water, what is the mass % of NaCl in the solution? Enter your answer with one decimal place, and as a percentage, such as 15.7%, or just 15.7.

Answer 1

Answer : The mass percent of NaCl is, 5.7 %

Explanation : Given,

Mass of NaCl = 6 g

Mass of water  = 100 g

Mass of solution = Mass of NaCl + Mass of water

Mass of solution = 6 g + 100 g

Mass of solution = 106 g

Mass % : It is defined as the mass of solute present in the solution.

To calculate the mass percentage of NaCl, we use the equation:

$\text{Mass percent of }NaCl=\frac{\text{Mass of }NaCl}{\text{Mass of solution}}\times 100$

Now put all the given values in above equation, we get:

$\text{Mass percent of }NaCl=\frac{6g}{106g}\times 100=5.7\%$

Hence, the mass percent of NaCl is, 5.7 %