Question

What is the unit of molarity?

Answer 1

Molar concentration (also known as molarity, quantity concentration, or substance concentration) is a measure of a chemical species' concentration in a solution, in terms of the amount of substance per unit volume of solution.

Complete answer:
The amount of a material in a given volume of solution is measured in molarity $\left( M \right)$ . The moles of a solute per litre of a solution is known as molarity. The molar concentration of a solution is also known as molarity.
$Molarity\left( M \right) = \dfrac{{{n_{solute}}}}{{{V_{solution}}}}$
Where, ${n_{solute}}$ = Number of moles of solute added
${V_{Solution}}$ = Volume of solution in litres
Therefore, the unit of molarity is $mol \cdot {L^{ - 1}}$

Additional information:
Advantages and disadvantages of using molarity:
Advantage:
The use of molarity to describe concentration has two major advantages. The first benefit is that it is simple and straightforward to use because the solute can be measured in grams, converted to moles, and then mixed with a volume.
The second benefit is that the overall molar concentration is equal to the sum of the molar concentrations. This allows for density and ionic strength computations.
Disadvantage:
The fact that molarity fluctuates with temperature is a significant drawback. This is due to the fact that temperature has an effect on the volume of a liquid. This is not a problem if all measurements are done at the same temperature (e.g., room temperature). When stating a molarity figure, however, it's best to include the temperature. When producing a solution, take in mind that if you use a hot or cold solvent but store the resulting solution at a different temperature, the molarity will alter significantly.

Note:
For dilute aqueous solutions kept at a constant temperature, molarity is utilised. For aqueous solutions near room temperature, the difference between molarity and molality is quite minor, therefore it doesn't really matter whether you use a molar or molal concentration.