Question

If 13.5 g NaCI were dissolved in 250.0 g of water, what is the mass percent of NaCI in the solution? What is the mass percent of water in the solution?

Answer 1

Answer: The mass percent of $NaCl$ is 6.3 % and mass percent of water is 93.7%.

Explanation:

To calculate the mass percent of element in a given compound, we use the formula:

$\text{Mass percent }=\frac{\text{Mass of given compound}}{\text{Total mass}}\times 100$

Given :

Mass of $NaCl$ = 13.5 g

Mass of water = 250.0 g

Putting values in above equation, we get:

$\text{Mass percent of}NaCl=\frac{13.5}{13.5+250.0}\times 100=6.3\%$

Hence, the mass percent of $NaCl$ is 6.3 %.

Putting values in above equation, we get:

$\text{Mass percent of water=\frac{200}{13.5+250.0}\times 100=93.7\%$

Hence, the mass percent of water is 93.7 %.