Question

What volume (l) of 0.750 m kcl solution contains 25.0 g of kcl?

Answer 1

First, we determine the number of moles of KCl which has a molar mass of 74.55 g/mol.

n = (25 g KCl)(1 mol/ 74.55 g KCl) = 500/1491 mol

Then, divide the number of calculated number of moles by the given molarity.

V = (500 / 1491 mol) / (0.750 mol/L)

V = 0.447 L

Answer: 0.447 L of solution

Answer 2

Conc = moles / Vol you have C but need to find moles
moles KCl = mass / molar mass
25 g / 74.55 g,p;
0.335 moles
So rearrange the formula to find volume. Vol = moles / Conc
0.335 moles / 0.750 mol / L = 0.447 L or 447 mL

The answer in this question is 447 mL.