Answer: Molarity of a physiological saline solution is 0.15 M
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.
[tex]Molarity=\frac{n\times 1000}{V_s}[/tex]
n = moles of solute
[tex]V_s[/tex] =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:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}=\frac{0.89g}{58.5g/mol}=0.015moles[/tex]
Volume of solution = 100 ml
[tex]Molarity=\frac{0.015\times 1000}{100ml}=0.15M[/tex]
Molarity of physiological saline solution is 0.15 M
