4 Flashcards
1
Q
Ca(s) flame
A
Brick red
2
Q
Ca(OH)2
A
Only slightly soluble in water
3
Q
Factors affecting rate
A
- don’t say SA, say moles
- don’t say volume, say concentration
- strength and position of flame
4
Q
Electron pairs are sometimes
A
Unequally shared
5
Q
Instead of saying increased polarising power
A
carbonate ion is polarised less
6
Q
3Br2 + 6OH- ->
A
5Br- + BrO3- + H2O
7
Q
Cl2(g) + H2O(l) ->
A
HOCl(aq) + HCl(aq)
8
Q
3Br2 + 6NaOH ->
A
NaOBr3 + 5NaBr + 3H2O
9
Q
8HI + H2SO4 ->
A
4I2 + H2S + 2H2O
10
Q
Test for halides
A
- HNO3
- dilute silver nitrate
- precipitate
- ammonia solubility
11
Q
ammonium test
A
- add NaOH
- red litmus -> blue
12
Q
carbonate test observations
A
limewater turns cloudy
effervescence
13
Q
eqn for carbonate test
A
CaCO3 + HCl -> CaCl2 + H2O + CO2
