Question

What weight (in grams) of KCl is there in 2.50 liters of 0.50M KCl solution?

Answer 1

Answer : The weight of KCl in the solution is, 93.125 grams

Solution : Given,

Molarity of KCl solution = 0.50 M

Molar mass of KCl = 74.5 g/mole

Volume of solution = 2.50 L

Molarity : It is defined as the number of moles of solute present in one liter volume of solution.

Formula used :

$Molarity=\frac{\text{Mass of KCl}}{\text{Molar mass of KCl}\times \text{volume of solution}}$

Now put all the given values in this formula, we get the mass of KCl.

$0.50mole/L=\frac{\text{Mass of KCl}}{74.5g/mole\times 2.50L}$

$\text{Mass of KCl}=93.125g$

Therefore, the weight of KCl in the solution is, 93.125 grams