Question

A 0.89% (w/v) sodium chloride solution is referred to as physiological saline solution because it has the sameconcentration of salts as human blood. What is the molarity of a physiological saline solution?

Answer 1

Answer: Molarity of a physiological saline solution is 0.15 M

Step-by-step explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

`Molarity=(n* 1000)/(V_s)`

n = moles of solute

`V_s` =volume of solution in ml

Given : 0.89 g of sodium chloride in 100 ml of solution.

To calculate the moles, we use the equation:

`\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}=(0.89g)/(58.5g/mol)=0.015moles`

Volume of solution = 100 ml

`Molarity=(0.015* 1000)/(100ml)=0.15M`

Molarity of physiological saline solution is 0.15 M