Question

a 250ml bottle of a sports drink solution contains 4.50y mass of sodium chloride. what is the molal concentration of sodium chloride in this bottle of sports drink

Answer 1

The molal concentration of sodium chloride in the sports drink is 0.018 mol/kg.

Step-by-step explanation:

The molal concentration of sodium chloride in the sports drink can be calculated using the equation:

Molality (m) = Mass of solute (in kg) / Mass of solvent (in kg)

First, we need to convert the mass of sodium chloride from grams to kilograms:

Mass of sodium chloride = 4.50 g = 0.00450 kg

The volume of the sports drink solution is given as 250 mL, which is equivalent to 0.25 L.

Density of the solution = 1.02 g/mL = 1.02 kg/L

Using the formula:

Molality = 0.00450 kg / 0.25 L = 0.018 mol/kg

Therefore, the molal concentration of sodium chloride in the sports drink is 0.018 mol/kg.