Question

What is the molarity of a solution containing 0.30 moles of FeCI3, dissolved in 150 ml of water

Answer 1

Answer:

2M

Explanation:

Given parameters:

Number of moles of FeCl₃  = 0.3 moles

Volume of water  = 150mL

Unknown:

Molarity of solution = ?

Solution:

The molarity of a solution is the number of moles of solutes in a given solution. It is one of the ways of expressing concentration. The unit is always M i.e mol/dm³.

              Molarity  = $\frac{number of moles }{volume}$

Express the volume in dm³;

                 150mL gives 0.15dm³

               Molarity  = $\frac{0.3}{0.15}$

                                = 2M