Acid Bases And Salts paper 2 Flashcards
1
Q
Acid and bases
A
Acids = proton donors (aqueous sources of H+) Bases = proton acceptors (aqueous sources of OH-)
2
Q
Insoluble base + acid = soluble salt + H2O
A
- add excess base to acid
- filter
- heat till saturation point
- crystallise
- wash with distilled water
- filter
- dry
3
Q
Titration
Acid + alkali = soluble salt + H2O
A
- add alkali + indicator
- titrate acid until colour change
- repeat until 3 concordant results
- repeat with average titre without indicator
- heat, crystallise, wash, filter, dry
4
Q
Precipitation
Salt + salt = insoluble salt + salt
A
- add together
- filter
- wash
- dry
5
Q
Metal + acid =
A
H2 + salt
6
Q
Acid + base/alkali
A
H2O + salt (neutralises)
7
Q
Acid + carbonate
A
H2O + salt + CO2
8
Q
What are alkalis
A
They are bases that are soluble in water
9
Q
Litmus paper goes
A
acid - red
alkali - blue
10
Q
phenolphthalein goes
A
acid - colourless
alkali - pink
11
Q
methyl orange goes
A
acid - red
alkali - yellow
12
Q
Universal indicator
A
acid - red
neutral - green
alkali - blue / purple
13
Q
Metal oxides, metal hydroxides and ammonia
A
are bases
14
Q
sodium, potassium and ammonium are
A
soluble
15
Q
nitrates are
A
soluble
