Calculations in aqueous solution

• What is the term for chemical reactions that occur in aqueous solution?

  Aqueous reactions
• What does concentration measure in a solution?

  Amount of solute per unit of solvent
• What is another name for concentration?

  Molarity
• How is concentration quantified in moldm⁻³?

  c = n/V
• How is concentration quantified in g dm⁻³?

  c = m/V
• How do you convert 400 cm³ to dm³?

  400 cm³ = 0.400 dm³
• What is the concentration of a solution with 0.20 mol of NaCl in 400 cm³ of water?

  0.50 moldm⁻³
• How do you calculate the amount of NaOH from 16.0 g?

  Amount = mass/molar mass
• What is the amount of NaOH in moles from 16.0 g?

  0.40 mol
• What is the concentration of a solution with 0.40 mol of NaOH in 200 cm³ of water?

  2.0 moldm⁻³
• How is percentage yield calculated?

  Percentage yield = actual amount/theoretical amount × 100
• What is the theoretical yield of ammonium nitrate from 0.25 mol dm⁻³ nitric acid in 100 cm³?

  0.025 mol
• How do you find the actual amount of ammonium nitrate from 1.6 g?

  Actual amount = mass/molar mass
• What is the actual amount of ammonium nitrate from 1.6 g?

  0.020 mol
• What is the percentage yield of ammonium nitrate if the actual amount is 0.020 mol and theoretical is 0.025 mol?

  80%
• What are the steps to calculate concentration in aqueous solutions?

  1. Recall the equation c = n/V
  2. Convert volume to dm³
  3. Substitute values into the equation
• What are the steps to calculate percentage yield?

  1. Find theoretical yield
  2. Calculate actual amount
  3. Use percentage yield formula