The Concentration of a KNO3 Solution

What is the molality of a solution that contains 5.10 mol KNO3 in 4.47 kg water? The answer will be 1.14m because Molality = moles of solute / kilograms of solvent m = 5.10 / 4.47m = 1.14 molal.

The molality of a solution is a measure of the concentration of a solute in a solution and is defined as the number of moles of solute per kilogram of solvent.

To calculate the molality of a solution that contains 5.10 mol KNO3 in 4.47 kg of water, we use the formula:

Formula for Molality:

molality (m) = moles of solute / kilograms of solvent

Substituting the given values:

molality (m) = 5.10 mol KNO3 / 4.47 kg water

molality (m) = 1.1411 mol/kg

The molality of the KNO3 solution is therefore 1.1411 mol/kg, assuming no significant change in volume upon dissolving KNO3.

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