: Using titration data to calculate the percentage by mass of a substance (e.g., ascorbic acid in a sample).
The MCQ section of Paper 3 consists of 20 questions, each carrying 2 marks. Here are the answers to the MCQs: A Level H2 Chemistry 2021 Paper 3 Answers
The 2021 Paper 3 was marked by a significant error where in three chemical structures. This led to varying responses across Junior Colleges: : Using titration data to calculate the percentage
The 2021 A Level H2 Chemistry Paper 3 (Syllabus 9729) is a structured essay paper consisting of two sections: Section A (compulsory structured questions) and Section B (a choice of one out of two essay-style questions). This led to varying responses across Junior Colleges:
: Oxidation of iodide ions by chlorine and titration of ascorbic acid. Equilibria & Thermochemistry
A significant highlight of this paper was a drawing error in Question 5, where three chemical structures were depicted with incorrect atomic bonds. While some schools provided errata slips or extra time, the incident caused varied levels of disruption across examination centers. Since Question 5 was part of the optional Section B, many candidates successfully avoided the issue by choosing the alternative question.
The A Level H2 Chemistry 2021 Paper 3 exam can be a challenging and daunting experience for many students. As a follow-up to our previous post on the exam format and content, we will now provide a comprehensive guide to the answers for the 2021 Paper 3 exam. This will help students gauge their performance, identify areas for improvement, and gain insights into the marking scheme.