Titration Calculations Quiz
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5 questions, one answer each
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1. Which equation links moles, concentration and volume in a titration calculation?
- A. n = c ÷ V
- B. n = c × V
- C. c = n × V
- D. V = n × c
2. Before using n = c × V with a volume measured in cm³, what must you do?
- A. Multiply the volume by 1000
- B. Divide the volume by 1000 to convert it to dm³
- C. Divide the concentration by 1000
- D. Nothing — the equation works directly with cm³
3. 25.0 cm³ of 0.200 mol/dm³ hydrochloric acid exactly neutralises 20.0 cm³ of sodium hydroxide solution (1:1 reaction). What is the concentration of the sodium hydroxide?
- A. 0.16 mol/dm³
- B. 0.20 mol/dm³
- C. 0.25 mol/dm³
- D. 0.32 mol/dm³
4. How would you convert a concentration of 0.05 mol/dm³ sodium hydroxide (Mr = 40) into g/dm³?
- A. 0.05 ÷ 40 = 0.00125 g/dm³
- B. 0.05 × 40 = 2 g/dm³
- C. 40 ÷ 0.05 = 800 g/dm³
- D. 0.05 + 40 = 40.05 g/dm³
5. In a titration using sulfuric acid and sodium hydroxide (H2SO4 + 2NaOH → Na2SO4 + 2H2O), a student mistakenly uses a 1:1 mole ratio instead of 1:2. What effect would this have on their calculated concentration of sulfuric acid?
- A. No effect, as the ratio does not matter for this calculation
- B. The calculated concentration of acid would be twice the correct value
- C. The calculated concentration of acid would be half the correct value
- D. The calculation would be impossible to complete