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Flashcards in Chemical Tests Deck (21):
0

Acid

Litmus goes red
Methyl orange red --> orange

1

Oxygen

Glowing splint relights

2

Hydrogen

Lit splint explodes with a squeaky pop

3

Carbon dioxide

Bubble through limewater and it goes cloudy

4

Chlorine

Damp red litmus paper bleaches

5

Ammonia

Damp red litmus paper goes blue

6

Alkenes

Bromine water goes orange --> colourless

7

Water

Anhydrous copper 2 sulphate white to blue
OR
Cobalt chloride blue to pink
OR
For pure boils at 100c

8

Li*

Dip wore loop in conc hydrochloride acid then into solid compound and place in Bunsen burner flame
Crimson flame

9

Na*

Dip wore loop in conc hydrochloride acid then into solid compound and place in Bunsen burner flame
Orange / yellow flame

10

K*

Dip wore loop in conc hydrochloride acid then into solid compound and place in Bunsen burner flame
Lilac flame

11

Ca2*

Dip wore loop in conc hydrochloride acid then into solid compound and place in Bunsen burner flame
Brick red

12

Cu2*

Aqueous sodium hydroxide
Blue precipitate
Cu(OH)2

13

Fe2*

Aqueous sodium hydroxide
Green precipitate
Fe(OH)2

14

Fe3*

Aqueous sodium hydroxide
Brown precipitate
Fe(OH)3

15

Ammonium NH4*

Aqueous sodium hydroxide WARM
Bubbles of gas turns damp red litmus paper blue

16

Cl-

Dilute nitric acid then silver nitrate
White precipitate
AgCl

17

Br-

Dilute nitric acid then silver nitrate
Cream precipitate
AgBr

18

I-

Dilute nitric acid then silver nitrate
Yellow precipitate
AgI

19

Carbonate

Add acid
Bubbles of gas (CO2)

20

Sulphate

Add dilute hydrochloride acid then barium chloride
White precipitate
BaSO4