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Molarity and Molality in Chemistry

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Questions and Answers

What is the primary reason why molality is preferred over molarity in delicate measurements?

Molality is more accurate for ideal solutions

Molality does not contain a volume term (correct)

Molality is less susceptible to temperature changes

Molality is a more convenient conversion factor

What is the unit of molarity expressed in?

mol/L (correct)

mol/kg

mol/cm³

mol/mg

In what type of solutions is the volume additive?

Solid solutions

Ideal solutions (correct)

Aqueous solutions

Nonideal solutions

Why is molarity not precise at a specific temperature?

It is affected by changes in temperature Signup and view all the answers

What is the unit of molality expressed in?

mol/kg Signup and view all the answers

Why is molarity easy to use in aqueous solutions?

Because the solute is easily convertible to mass Signup and view all the answers

What is the primary factor that colligative properties depend on?

The quantity of the solute Signup and view all the answers

Why do colligative properties use molal concentrations and not molar concentrations?

Because molal concentrations are based on the mass of the solvent Signup and view all the answers

What is the relationship between molarity and molality in sufficiently dilute solutions?

m is equal to M Signup and view all the answers

Which of the following concentrations decreases faster as solutions get diluted?

Molarity Signup and view all the answers

What is the unit of molality?

moles per kilogram Signup and view all the answers

What is the goal of calculating the molarity or molality of a solution?

To determine the concentration of the solution Signup and view all the answers

Why is molality preferred over molarity in laboratory experiments?

Because masses of solute and solvent do not vary with temperature Signup and view all the answers

What is the key difference between molarity and molality?

The units of measurement for the solute and solvent Signup and view all the answers

What is the unit of measurement for the solute in molality?

Moles per kilogram Signup and view all the answers

Why do masses of solute and solvent add up in molality?

Because masses are additive regardless of intermolecular forces Signup and view all the answers

What is the purpose of identifying the given information in a problem?

To determine the unknown variable in the problem Signup and view all the answers

What is the unit of measurement for the concentration of the glucose solution in the example?

Moles per liter Signup and view all the answers