Question

How can I calculate the osmolarity of $NaCl$?

Answer 1

Hint: The molarity is also known as molar concentration. The amount of substance dissolved in one liter of solution is known as molarity. Hence, we can find the molarity by dividing the number of moles by liters of solution. And the moles of solute are represented as ‘n’ and the liters of solution are known as ‘v’. Therefore, we can say that the number of moles present in the unit volume will affect the molarity. Here, the volume is increasing with increasing temperature.

Complete answer:
We need to know that sodium chloride is a chemical compound having the molecular formula, $NaCl$. And the sodium chloride is generally known as salt. Here the sodium and chloride ions are present in sodium chloride in $1:1$ ratio. The osmolarity is equal to the concentration of the solution which is expressed as the whole number of particles of solute present in the liter. The osmolarity of sodium chloride can be calculated by twice the molarity of sodium chloride. The osmolarity is the concentration of total ions present in the solutions and in the case of sodium chloride, it is equal to the sum of concentration of sodium ion and chloride ion.

Note:
As we know that sodium chloride is an ionic compound and it acts as a strong electrolyte. When the sodium chloride dissolves in a solution which gives the stoichiometric, sodium ions and chloride ions. That is, it undergoes complete dissociation when it dissolves in water. By multiplying the molarity of sodium chloride by two, we will get the osmolarity of the sodium chloride.