Karteikarten
OCR A2 Chemistry : Acids and Bases
Karten in diesem Stapel (19)
- 1equation for pH- log [H+]
- 2How to work out [H+] from pH10 ^ -pH
- 3Bronsted - Lowry Acid DefinitionA proton donor
- 4Bronsted - Lowry Base DefinitionA proton acceptor
- 5Strong Acid DefinitionAn acid which completely dissociates in aqueous solution
- 6Weak Acid DefinitionAn acid which only partially dissociates in aqueous solution
- 7Ka (Acid Dissociation Constant)
- 8Units for Kamol dm ^ -3
- 9A large Ka indicates what?A large extent of dissociation, therefore the acid is strong
- 10A small Ka indicates what?A small extent of dissociation, therefore the acid is weak
- 11equation for pKa
- 12How to work out Ka from pKa10 ^ -pKa
- 13The smaller the value of pKa ...... the stronger the acid
- 14equation for Kw (ionic product of water)[H+] x [OH-]
- 15At 25 degree Celsius, the value of Kw is1.00 x 10 ^ -14
- 16Units for Kwmol ^ 2 dm ^ -3
- 17Buffer DefinitionA mixture which minimises pH changes on the addition of small amounts of acid or base
- 18What is an acidic buffer solution made of?A weak acid and a salt of the weak acid
e.g ethanoic acid and sodium ethanoate - 19What is an alkaline buffer solution made of?A weak base and a salt of the weak base
e.g ammonia and ammonium chloride
Informationen
- Beschreibung
- Includes definitions, pH, Ka, Kw and buffers
- Erstellt von
- Sarah H-V
- Aufrufe
- 196
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