acids and bases Flashcards
1
Q
what is acid
A
- dissolves in water to form hydrogen ions
- react with metal to form salt and H2
- react with carbonate to form salt,H2) and CO2
- sour taste
- turn blue litmus paper red
- pH <7
2
Q
what is base
A
- metal oxide/hydroxide that react with acids to produce salt and water
- heat alkali with ammonium salts = salt +water + ammonia gas
- bitter taste
- turn red litmus blue
- pH>7
3
Q
what is alkali
A
alkali dissolve in water to produce hydroxide ions
4
Q
acid strength
A
- found by degree of ionisation of acid in water
- strong acid = fully dionise in water
- weak acid = partially dionise
5
Q
concentration of acids
A
- depend on amount of acid dissolved in water
6
Q
oxides
A
- compounds formed from oxygen and another element
- are either acidic , basic ,amphoteric or neutral
7
Q
acidic oxides
A
-non-metals usually = acidic oxide which dissolve in water to give acids
acidic -oxides react with bases to form salt and water
8
Q
basic oxides
A
- metals usually form basic oxides
- some dissolve in water to give alkalis
- react with acid to form salt + water
9
Q
amphoteric oxides
A
- some metals form amphoteric oxides
- display both acidic and basic properties
10
Q
neutral oxides
A
- some non-metals form it
- shows neither basic or acidic properties
