Flashcards in test - delete after Deck (11):
1
Flame tests
- Lithium, Li+, Red
-Sodium, Na+, Orange
-Potassium, K+, Lilac
-Calcium, Ca 2+ Brick Red
2
How do Flame tests work?
-Clean platinum wire by dripping in concentrated acid, then into flame
-Dip wire into metal salt
-place in flame
3
How to test of the ammonium ion, NH4+
-Add sodium hydroxide
-Test the gas produced (ammonia, NH3) with DAMP red litmus paper
-paper will turn blue
4
Sodium hydroxide tests
-Cu 2+, Blue precipitate
-Fe 2+, Green precipitate
-Fe 3+, Rust Brown precipitate
5
Halide tests - nitric acid and silver nitrate solution
-Cl (minus) - white
-Br (minus) - cream
-I (minus) - yellow
6
Equation for Cl-
Ag+ (aq) + Cl- (aq) ----> AgCl(s)
7
Equation for Br-
Aq+ (aq) + Br- (aq) ----> AgBr(s)
8
Equation for I-
Aq+ (aq) + I- (aq) ----> AqI(s)
9
Test for sulphate anion (SO4 2-)
-Add hydrochloric acid
-Add a solution of barium chloride
-WHITE precipitate (solid) produced is barium sulphate (BaSo4)
10
Test for the carbonate anion (CO3 2-)
-Add hydrochloric acid
-Bubble the gas (CO2) produced through limewater
-Turns cloudy
11