Question

1. Calculate the number of moles of solute in the following
volumes of solution.

(a) 50 cm3 of 0.5 moldm-3 solution. (b) 100 cm3 of 0.5 moldm-3 of
solution.

(c) 250 cm3 of 2 mol/ dm3 of solution (d) 2 dm3 of 2 moldm-3 of
solution.

2. Find the masses of solute in the following volumes.

(a) 24 cm3 of 0.1 moldm-3 NaCl. (b) 50 cm3 of 1 Molar (M)
Sulfuric acid.

(c) 100 cm3 of 4g/dm3 NaOH (d) 250 cm3 of 11.1gdm-3 CaCO3.

3. Express the following concentrations in moldm-3

(a) 20g NaOH in 500 cm.3 (b) 0.5 g HCl in 25 cm.3 (c) 5.85g
NaCl in 40 cm3 (d) 1.06g Na2CO3 in 20 cm3.

Answer 1

Answer:

What is the formula for molar concentration?

M = \frac{n}{v}

M = molar concentration

n = moles of solute

v = liters of solution