A-LevelChemistryAtoms, molecules and stoichiometryOct/Nov 2017Paper 3 Q211 Marks
In this experiment you will determine the value of y in the formula for hydrated barium chloride, BaCl2.yH2O. You will do this by measuring the mass loss when a sample of hydrated barium chloride is heated. BaCl2.yH2O(s) → BaCl2(s) + yH2O(g) FA 5 is hydrated barium chloride, BaCl2.yH2O.
✓ Correct Answer
The correct answer is —. This question tests the candidate's understanding of atoms, molecules and stoichiometry 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