13594333
Description
Flashcards by I Shouldn't be awake, updated more than 1 year ago
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Created by I Shouldn't be awake
over 6 years ago
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| Question | Answer |
| Bronsted-lowry model emphasises | Proton transfer |
| Bronsted-lowry acid | Proton donor |
| Bronsted-lowry base | proton acceptor |
| Conjugate acid-base pairs for HCl and Water | HCl + H2O <-> H3O+ + Cl- Acid 1 Base 2 Acid 2 Base 1 |
| Spectator ions are | Ions that don't participate in reaction |
| Express pH to ___ dp | 2 |
| pH = [H+(aq)] = | pH = -log[H+(aq)] [H+(aq)] = 10^-pH |
| [H+(aq)] of strong acid | [H+(aq)] = [HA(aq)] Totally dissociates |
| Ka = | Ka = [H+(aq)]*[A-(aq)] --------------- [HA(aq)] |
| Larger the Ka value = | Stronger the acid, more it dissociates |
| pKA = Ka = | pKa = -logKa Ka=10^-pKa |
| Weak acid approximations (2) | 1. H+ dissociation from H2O is negligible: [H+(aq)] = [A-(aq)] 2. H+ dissociation from weak acids is tiny so [HA(aq)]start = [HA(aq)]eq |
| Ka for weak acids | Ka = [H+(aq)]^2 / [HA(aq)] |
| When do approximations fail? | When Ka > 10^-2 moldm-3 |
| Kw | 1.00*10^-14 mol-2 dm6 |
| Formula for Kw | Kw = [H2O] = [OH-(aq)][H+(aq)] |
| What to keep in mind when dealing with di/tribasic acids/bases? | [OH-(aq)] x 2/3 [H+(aq)] x 2/3 |
| % dissociation of acid | [H+(aq)] * 100 / [HA(aq)] |
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