A-LevelChemistryAnalytical techniquesMay/June 2017Paper 3 Q114 Marks
HA is an organic acid where A¯ is the anion. You will determine the relative formula mass, M., of HA by titration with sodium hydroxide of known concentration and so identify the anion, A¯. The equation for the reaction is shown. HA(aq) + NaOH(aq) → NaA(aq) + H2O(l) FB 1 is a solution of organic acid, HA, containing 12.60g dm-3. FB 2 is 0.100 mol dm⁻³ sodium hydroxide, NaOH. thymol blue indicator
✓ Correct Answer
The correct answer is —. This question tests the candidate's understanding of analytical techniques within the Chemistrysyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🔒
Unlock the Examiner's Answer
Sign up for free to reveal the correct answer, the official mark scheme breakdown, and the examiner trap analysis for this question.
Sign Up Free to Unlock →Join thousands of Cambridge students already using Oracle Prep