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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

Chemical test for water, H20

-Anhydrous copper(II) sulphate: White to Blue
-Anhydrous cobalt(II) chloride: Blue to Pink