A-LevelChemistryEquilibria9701/12 · Oct/Nov 2021 · Q321 Mark
Four solutions, each of concentration 0.1 mol dm⁻³, were tested with a pH meter. The results are shown. solution | formula of acid or base | pH ---|---|--- acid 1 | CH3CO2H | 4 acid 2 | HNO3 | 1 base 1 | CH3NH2 | 11 base 2 | NaOH | 14 Which statements explain these results? 1 Acid 2 has a lower pH than acid 1 because it is more soluble. 2 Base 2 has a higher concentration of hydroxide ions in solution than base 1. 3 Acid 1 dissociates less than acid 2.
A1, 2 and 3 are correct
B1 and 2 only are correct
C2 and 3 only are correct
D1 only is correct
✓ Correct answer
C: 2 and 3 only are correct
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