Practical Skills in Chemistry I

Worked examples (8)

• 1Percentage uncertainty of a titre from burette resolution (3 marks)
• 2Writing a health u0026 safety statement that scores (2 marks)
• 3Variables AND method of control in a novel plan (4 marks)
• 4Systematic vs random error, with a targeted improvement (4 marks)
• 5Mean of concordant titres and a concentration (4 marks)
• 6Initial rate from a tangent at t = 0, with units (3 marks)
• 7Qualitative analysis: reagent → observation → conclusion (4 marks)
• 8Evaluating a flawed experimental design (novel scenario) (4 marks)

Model answers (9)

• ✓Model answer — Edexcel IAL Chemistry Unit 3 style
• ✓Model answer — Core Practical 7 style
• ✓Model answer — Edexcel IAL Chemistry Unit 3 style
• ✓Model answer — Edexcel IAL Chemistry Unit 3 style
• ✓Model answer — Edexcel IAL Chemistry Unit 3 style
• ✓Model answer — Core Practical 8 style
• ✓Model answer — Core Practical 5 style (planning)
• ✓Model answer — Core Practical 2 style (evaluation)
• ✓Model answer — Core Practical 3 style