R3.1 Proton transfer reactions (SL)
15 revision questions with answers for R3.1 Proton transfer reactions (SL). Read them here, or play the set as a class game on the projector. Free to host, and students join with a code.
Species that donates H⁺ to another species?
- Brønsted–Lowry base
- Conjugate base
- Amphiprotic species
- Brønsted–Lowry acidRight answer
What this set covers
Acids and bases at SL: Brønsted–Lowry definitions, conjugate pairs, amphiprotic species, Kw, pH and the 100-fold change over two pH units, neutralisation reactions, strong versus weak acids and titration equivalence points.
- Common mix-up
- Students often mix up strong and concentrated: HCl and ethanoic acid at equal concentration differ in pH because strength is about how far the acid dissociates.
- Revision tip
- Write the conjugate base for several acids, such as H₂SO₄ and NH₃'s conjugate acid, then calculate pH from [H⁺] for two concentrations.
All 15 questions and answers
Species that donates H⁺ to another species?
Answer: Brønsted–Lowry acid
Conjugate base of H₂SO₄?
Answer: HSO₄⁻
Conjugate acid of NH₃?
Answer: NH₄⁺
Species that can both donate and accept H⁺, like HCO₃⁻?
Answer: Amphiprotic
Kw at 298 K?
Answer: 1.0 × 10⁻¹⁴
[OH⁻] when [H⁺] = 1.0 × 10⁻³ mol dm⁻³ at 298 K?
Answer: 1.0 × 10⁻¹¹ mol dm⁻³
pH of 0.010 mol dm⁻³ HCl?
Answer: 2
pH of a solution with [H⁺] = 1 × 10⁻⁵ mol dm⁻³?
Answer: 5
Change in [H⁺] when pH falls from 5 to 3?
Answer: Increases 100-fold
Products of HCl reacting with NaOH?
Answer: Salt and water
Gas made when an acid reacts with a metal carbonate?
Answer: Carbon dioxide
Acid that only partially dissociates in water?
Answer: Weak acid
Equal concentrations of HCl and CH₃COOH: which has the higher pH?
Answer: Ethanoic acid
Point in a titration where acid and base have reacted in exact proportion?
Answer: Equivalence point
pH at the equivalence point of a strong acid–strong base titration at 298 K?
Answer: 7
Play it as a class game
Play this set opens it in splycr, where you can host it for your class straight away. Hosting needs no account: put the room code on the projector, and students join from a phone with the code and their first name. Each question plays as multiple choice, and the three wrong options were written for that question.