Chemistry IGCSE

gamer292
Mind Map by gamer292, updated more than 1 year ago
gamer292
Created by gamer292 almost 4 years ago
49
4

Description

Going over some of the key elements needed for the upcoming exam

Resource summary

Chemistry IGCSE
1 Li - Crimson Red flame
2 Na - Yellow-Orange flame
3 K - Lilac Flame
4 Ca - Brick-Red flame
5 Dip clear platinum loop in HCL (aq)
6 Hold in a roaring blue flame
7 Wait till it burns with no colour
8 Dip in sample then place in flame
9 Test for coloured precipitate with Sodium Hydroxide (NaOH)
9.1 Copper 2+ Ions - Blue precipitate
9.1.1 Cu 2+ (aq) + 2OH- (aq) → Cu(OH)2 (s)
9.2 Iron 3+ ions - Reddish-Brown precipitate
9.2.1 Fe 3+ (aq) + 3OH- (aq) → Fe(OH)3 (s)
9.3 Iron 2+ ions - Sludgy green precipitate
9.3.1 Fe 2+ (aq) + 2OH- (aq) → Fe(OH)3 (s)
10 Ammonium Compound + NaOH = Ammonia!
10.1 Usually smells of cat urine
10.1.1 Check using litmus paper
10.1.1.1 Damp red litmus paper blue
10.1.1.1.1 NH4 give off ions which react with the litmus paper making it blue as it is an alkaline
11 Test for Anions
11.1 Test for Carbonates
11.1.1 Add dilute Hydrochloric acid (aq) to the test sample
11.1.1.1 If carbonates are present then carbon dioxide will be released
11.1.1.1.1 Carbon dioxide turns limewater cloudy (Test)
11.1.1.1.1.1 CO3 (s) + 2H (aq) → CO2 (g) + H2O (l)
11.2 Test for Sulfates
11.2.1 Add dilute Hydrocholoric acid (aq) then barium chloride solution
11.2.1.1 A white precipitate means the compound was origanally a sulfate
11.2.1.1.1 Ba (aq) + SO (aq) → BaSO4 (S)
11.3 Test for Halides
11.3.1 To test for chloride, bromide or iodide ions, add dilute nitric acid (aq) then add silver nitrate solution (AgNO3)
11.3.1.1 Chloride Ion gives a White Precipitate of Silver Chloride
11.3.1.1.1 Bromide ion gives a Cream precipitate of Silver Bromide
11.3.1.1.1.1 Iodide ion gives a Yellow Precipitate of Silver Iodide
11.3.1.1.1.1.1 Ag (aq) + I (aq) → AgI (S)
11.3.1.1.1.2 Ag (aq) + Br (aq) → AgBr (S)
11.3.1.1.2 Ag (aq) + Cl (aq) → AgCl (S)
Show full summary Hide full summary

Similar

Flame tests
Joshua Rees
Cation, Anion & Flame Tests
lisawinkler10
Flame Colours
cfes.spam.accoun
IGCSE Coordinated Sciences Measurement & Practical Skillls
Jeffrey Piggott
C2 ion tests
Lucy Sherburn
Flame tests
Liffey Farrell
Flame tests
Bota Abuyeva
Flame tests
pepe galleta
Flame tests
drew Wright
Flame tests
james Senabulya
WJEC Chemistry 2017 Unit 1
grace thomas