tests

Question 1

test for lithium ion

Answer 1

flame test
crimson red

Question 2

sodium ion

Answer 2

flame test
yellow flame

Question 3

potassium ion

Answer 3

flame test
lilac flame

Question 4

calcium ion

Answer 4

flame test
orange red flame

Question 5

copper ion

Answer 5

flame test
blue green flame

Question 6

barium ion

Answer 6

flame test
light green flame

Question 7

test for chlorine gas

Answer 7

damp litmus paper
bleaches

Question 8

test for ammonia

Answer 8

damp red litmus
turns blue

Question 9

test for oxygen

Answer 9

glowing splint
relights/reglows

Question 10

test for hydrogen

Answer 10

lighted splint
pop sound

Question 11

test for sulfur dioxide

Answer 11

acidified potassium manganate
turns from purple to colorless

Question 12

test for carbon dioxide

Answer 12

limewater turns milky

Question 13

test for chloride

Answer 13

acidify with dilute nitric acid
add silver nitrate (or lead nitrate)

white ppt.

Question 14

test for bromide

Answer 14

acidify with dilute nitric acid
add silver nitrate (or lead nitrate)

cream ppt.

Question 15

test for iodide

Answer 15

acidify with dilute nitric acid
add silver nitrate (or lead nitrate)

yellow ppt.

Question 16

test for sulfite

Answer 16

acidified potassium manganate

purple to colorless

Question 17

test for sulfate

Answer 17

acidify with dilute nitric acid
add barium nitrate

white ppt.

Question 18

test for carbonate

Answer 18

acidify with dilute acid

effervescence (of CO2 gas)

Question 19

test for nitrate

Answer 19

add sodium hydroxide
add aluminium foil (powder)
warm

pungent smelling gas (NH3)

Question 20

aluminium with sodium hydroxide

Answer 20

white ppt. soluble in excess
colorless solution

Question 21

aluminium with ammonia

Answer 21

white ppt. insoluble in excess

Question 22

ammonium with sodium hydroxide

Answer 22

ammonia produced on warming

Question 23

chromium with sodium hydroxide

Answer 23

green ppt.
soluble in excess of

Question 24

chromium with ammonia

Answer 24

green ppt.
insoluble in excess

Question 25

calcium in sodium hydroxide

Answer 25

white ppt. insoluble in excess

Question 26

calcium in ammonia

Answer 26

no ppt. / slightly white ppt.

Question 27

copper in sodium hydroxide

Answer 27

light blue ppt. insoluble in excess

Question 28

copper in ammonia

Answer 28

light blue ppt. soluble in excess to form dark blue solution

Question 29

iron 2 in sodium hydroxide

Answer 29

green ppt. insoluble in excess brown near surface on standing

Question 30

iron 2 in ammonia

Answer 30

green ppt. insoluble in excess brown near surface on standing

Question 31

iron 3 in sodium hydroxide

Answer 31

red-brown ppt. insoluble in excess of

Question 32

iron 3 in ammonia

Answer 32

red-brown ppt. insoluble in excess

Question 33

zinc in sodium hydroxide

Answer 33

white ppt. soluble in excess to give colorless solution

Question 34

zinc in ammonia

Answer 34

white ppt. soluble in excess to give colorless solution