analysis

Question 1

ca+ ion and NaOH

Answer 1

white precipitate

Question 2

Cu2+ ion and NaOH

Answer 2

blue precipitate

Question 3

Fe2+ and NaOH

Answer 3

Green precipitate

Question 4

Fe3+ and NaOH

Answer 4

Brown precipitate

Question 5

Al3+ and NaOH

Answer 5

white at first but then redissolves in excess NaOH to form colourless solution

Question 6

Ammonium and NaOH

Answer 6

no precipitate but heating gives of ammonia which you can identify as it will turn damp universal indicator purple or damp red litmus paper blue. It also have distinct smell

Question 7

Cl- with nitric acid and silver nitrate

Answer 7

white precipitate of silver chloride

Question 8

Br- and nitric acid and silver nitrate

Answer 8

cream precipitate of silver bromide

Question 9

I- and nitric acid and silver nitrate

Answer 9

yellow precipitate of silver iodide

Question 10

sodium ion flame test

Answer 10

yellow/ orange

Question 11

potassium ion flame test

Answer 11

lilac flame

Question 12

calcium ions flame test

Answer 12

brick red flame

Question 13

copper ions flame test

Answer 13

blue green flame

Question 14

testing for carbonates

Answer 14

add an acid and then test the gas by bubbling it through lime water

Question 15

testing for sulfate ions

Answer 15

add dilute HCL and then barium chloride solution and a white precipitate of barium sulfate should form