Question

If 31.8 grams of LiCl are dissolved in 225 grams of water, what is the concentration of the solution in percent by mass?

Answer 1

(31.8/(225+31.8))(100)=12.38317757% LiCl

Answer 2

Answer: 12.4 %

Step-by-step explanation:

To calculate the mass percent of solution, we use the formula:

`\text{Mass percent of solution}=\frac{\text{Mass of solute}}{\text{mass of solution}}* 100`

Given :

mass of solute (LiCl) = 31.8 grams

mass of solvent (water) = 225 grams

Mass of solution = mass of solute + mass of solvent = 31.8 g + 225 g= 256.8 g

`\text{Mass percent of solution}=(31.8)/(256.8g)* 100=12.4%`

Thus concentration of the solution in percent by mass is 12.4%