IB DP Chemistry Mock Exam SL Paper 2 Set 5 - 2025 Syllabus
IB DP Chemistry Mock Exam SL Paper 2 Set 5
Prepare for the IB DP Chemistry Exam with our comprehensive IB DP Chemistry Exam Mock Exam SL Paper 2 Set 5. Test your knowledge and understanding of key concepts with challenging questions covering all essential topics. Identify areas for improvement and boost your confidence for the real exam
▶️ Answer/Explanation
(a)
(i)
Skeletal formula.
(ii)
(Tertiary) amino / amine.
(iii)
• Direction: Increase in pH.
• Reason: The nitrogen atom can accept a proton from water, so the group behaves as a base.
(iv)
The alkene (\(\text{C}=\text{C}\)) double bond should be circled. 
(v)
\(7\).
(b)
• Moles of strychnine \(= 48.73 / 334.4 = 0.1457 \text{ mol}\).
• Moles of product \(= 0.1457 / 2 = 0.07286 \text{ mol}\).
• Molar mass of product \(= (2 \times 334.4) + 98.1 = 766.9 \text{ g mol}^{-1}\).
• Theoretical yield \(= 0.07286 \times 766.9 = 55.87 \text{ g}\).
• Percentage yield \(= (51.41 / 55.87) \times 100 = \mathbf{92.00\%}\).