A-LevelChemistryGroup 2May/June 2023Paper 1 Q211 Mark
Solutions P and Q each contain a different Group 2 ion at the same concentration. One contains Mg²⁺ and the other contains Ba²⁺. Tests are carried out on separate 5 cm³ samples of P and Q. test 1: add 1 cm³ of 0.1 mol dm⁻³ Na₂SO₄(aq) test 2: add 1 cm³ of 0.1 mol dm⁻³ NaOH(aq) What are the results of these tests?
Amore precipitate with Ba²⁺ more precipitate with Ba²⁺
Bmore precipitate with Ba²⁺ more precipitate with Mg²⁺
Cmore precipitate with Mg²⁺ more precipitate with Ba²⁺
Dmore precipitate with Mg²⁺ more precipitate with Mg²⁺
✓ Correct Answer
The correct answer is B. This question tests the candidate's understanding of group 2 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