3.4 Using concentrations of solutions in mol/dm³

• Molar concentration is measured in mol/dm³
• Concentration in g/dm³ accounts for the molar mass of the solute.

  False
• If 2 moles of NaOH are dissolved in 1 dm³ of water, the molar concentration is 2 mol/dm³
• 0.5 moles of NaOH in 0.25 dm³ of water results in a molar concentration of 2 mol/dm³.


  True
• If 2 moles of NaOH are dissolved in 1 dm³ of water, the molar concentration is 2 mol/dm³.


  True
• To calculate molar concentration, divide the moles of solute by the volume of solution in dm³
• The formula for molar concentration is: Molar Concentration = Moles
• What is the molar concentration if 0.5 moles of NaOH are dissolved in 0.25 dm³ of water?

  2 mol/dm³
• Match the measure with its definition:

  Molar Concentration ↔️ Moles per volume of solution

  Concentration ↔️ Mass per volume of solution
• Molar concentration accounts for the molar mass of the solute, while percentage concentration does not.

  True
• What is molar concentration defined as?

  Moles per volume of solution
• Molar concentration provides a more precise measure compared to concentration in g/dm³
• Molar concentration provides a more precise measure than concentration in g/dm³ because it accounts for molar mass.

  True
• What is the unit of molar concentration?

  mol/dm³
• What is the formula for calculating molar concentration?

  \text{Molar Concentration} = \frac{\text{Moles}}{\text{Volume}}</latex>
• To calculate molar concentration, divide the moles of solute by the volume of solution in dm³.
• What is the molar concentration if 0.5 moles of NaOH are dissolved in 0.25 dm³ of water?

  2 mol/dm³
• The molar concentration of a solution with 0.5 moles of NaOH in 0.25 dm³ of water is 2 mol/dm³.

  True
• What is the molar concentration if 0.5 moles of NaOH are dissolved in 1 dm³ of water?

  0.5 mol/dm³
• The molar concentration of a solution with 2 moles of HCl in 0.5 dm³ of water is 4 mol/dm³.


  True
• Convert 200 cm³ to dm³.

  0.2 dm³
• If 0.2 moles of NaCl are dissolved in 0.2 dm³ of water, the molar concentration is 1 mol/dm³.
• What is the molar concentration if 2 moles of HCl are dissolved in 0.5 dm³ of water?

  4 mol/dm³
• What does molar concentration measure?

  Moles per volume
• What is the definition of molar concentration?

  Moles per volume
• What is the formula for calculating molar concentration?

  $\text{Molar concentration} =$$\frac{\text{moles}}{\text{volume}}$
• How do you calculate molar concentration?

  Divide moles by volume
• Why is molar concentration more precise than concentration in g/dm³?

  Accounts for molar mass
• What unit is used to measure molar concentration?

  mol/dm³
• Molar concentration is measured in mol/dm³
• What formula is used to calculate molar concentration?

  $\text{Molar Concentration} =$$\frac{\text{Moles}}{\text{Volume}}$
• If 0.5 moles of NaOH are dissolved in 0.25 dm³ of water, the molar concentration is 2 mol/dm³
• Molar concentration is measured in mol/dm³.

  True
• What is the formula to calculate molar concentration?

  $\text{Molar Concentration} =$$\frac{\text{Moles}}{\text{Volume}}$
• Molar concentration and percentage concentration are two different ways to express the concentration of a solution
• Match the measure with its definition and unit:

  Molar Concentration ↔️ Moles per volume of solution (mol/dm³)

  Percentage Concentration ↔️ Amount of solute as a percentage (%)
• How is molar concentration calculated?

  Moles divided by volume in dm³
• The formula for molar concentration is: Molar Concentration = Moles
• What is the molar concentration if 2 moles of NaOH are dissolved in 1 dm³ of water?

  2 mol/dm³
• What is the molar concentration if 2 moles of HCl are dissolved in 0.5 dm³ of water?

  4 mol/dm³