Tests for Cations 4.51

Question 1

What colour flame will Lithium burn with

Answer 1

a red flame

Question 2

What colour flame will Sodium burn with

Answer 2

a yellow flame

Question 3

What colour flame will Potassium burn with

Answer 3

a lilac flame

Question 4

What colour flame will Calcium burn with

Answer 4

an orange-red flame

Question 5

What colour flame will Copper burn with

Answer 5

a blue-green flame

Question 6

What do you add to your mystery solution to get a coloured precipitate

Answer 6

sodium hydroxide

Question 7

What coloured precipitate will Copper form

Answer 7

Blue

Question 8

What coloured precipitate will Iron(II) form

Answer 8

sludge green

Question 9

What coloured precipitate will Iron(III) form

Answer 9

Reddish brown

Question 10

What is the danger of deliberately smelling ammonia

Answer 10

Can be harmful to your eyes

Question 11

What is the test for Ammonia gas

Answer 11

Damp piece of red litmus paper will turn Blue is ammonia is present

Question 12

What is the test for ammonia ions

Answer 12

add some sodium hydroxide to solution

if ammonia if given off, it is present