Question

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What is the difference between molarity and molality??



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Answer 1

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Molarity (M) is defined as the number of moles of solute per liter of solution.

Molality (m) is defined as the number of moles of solute per kilogram of solvent.

Answer 2

Molality definition

=> Molality (m), or molal concentration, is the amount of a substance dissolved in a certain mass of solvent. It is defined as the moles of a solute per kilograms of a solvent.

Molality formula and units

=> The units of molality are m or mol/kg.

Molality equation

=> m = moles solute / kilograms solvent.

Molarity definition

=> Molarity (M) is the amount of a substance in a certain volume of solution. Molarity is defined as the moles of a solute per liters of a solution. Molarity is also known as the molar concentration of a solution.

Molarity formula and units

=> The units of molarity are M or mol/L. A 1 M solution is said to be “one molar.”

Molarity equation

=> M = moles solute / liters solution