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?

<p>It is affected by changes in temperature (D)</p> Signup and view all the answers

What is the unit of molality expressed in?

<p>mol/kg (B)</p> Signup and view all the answers

Why is molarity easy to use in aqueous solutions?

<p>Because the solute is easily convertible to mass (B)</p> Signup and view all the answers

What is the primary factor that colligative properties depend on?

<p>The quantity of the solute (B)</p> Signup and view all the answers

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

<p>Because molal concentrations are based on the mass of the solvent (C)</p> Signup and view all the answers

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

<p>m is equal to M (D)</p> Signup and view all the answers

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

<p>Molarity (C)</p> Signup and view all the answers

What is the unit of molality?

<p>moles per kilogram (C)</p> Signup and view all the answers

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

<p>To determine the concentration of the solution (A)</p> Signup and view all the answers

Why is molality preferred over molarity in laboratory experiments?

<p>Because masses of solute and solvent do not vary with temperature (C)</p> Signup and view all the answers

What is the key difference between molarity and molality?

<p>The units of measurement for the solute and solvent (C)</p> Signup and view all the answers

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

<p>Moles per kilogram (C)</p> Signup and view all the answers

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

<p>Because masses are additive regardless of intermolecular forces (A)</p> Signup and view all the answers

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

<p>To determine the unknown variable in the problem (C)</p> Signup and view all the answers

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

<p>Moles per liter (B)</p> Signup and view all the answers

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