A-LevelChemistryEquilibria9701/12 · Oct/Nov 2023 · Q261 Mark
NaOH(aq) is added to NH4Cl(aq). The mixture is warmed. The gas that is produced turns damp red litmus paper blue. Which row is correct?
Abehaviour of the ammonium ion in NH4Cl: Brønsted-Lowry acid; behaviour of the water present on the litmus paper: Brønsted-Lowry base
Bbehaviour of the ammonium ion in NH4Cl: Brønsted-Lowry acid; behaviour of the water present on the litmus paper: Brønsted-Lowry acid
Cbehaviour of the ammonium ion in NH4Cl: Brønsted-Lowry base; behaviour of the water present on the litmus paper: Brønsted-Lowry acid
Dbehaviour of the ammonium ion in NH4Cl: Brønsted-Lowry base; behaviour of the water present on the litmus paper: Brønsted-Lowry base
✓ Correct answer
B: behaviour of the ammonium ion in NH4Cl: Brønsted-Lowry acid; behaviour of the water present on the litmus paper: Brønsted-Lowry acid
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