chemical tests

Question 1

flame tests

Answer 1

lithium with a red flame 
sodium burns with a yellow flame 
potassium burns lilac flame
calcium orange-red flame
copper blue-green flame

Question 2

precipitates wiht NaOH

Answer 2

copper(II) blue
iron(II) green
iron(III)brown

Question 3

check for ammonia gas

Answer 3

it will turn damp red litmus paper blue

ammonium when reacted with NaOH will give off ammonia gas and therefore you can test for it.

Question 4

test for carbonates

Answer 4

if you add hcl to a carbonate you CO2 will be given off and therefore this means that you can then test fro CO2 using limewater

Question 5

test for sulfates

Answer 5

add dilute hcl and then barium chloride

if a white precipitate is given off this means that original compound was a a sulfate

Question 6

testing for hallides

Answer 6

add nitric acid and silver nitrate
chloride ion gives a white precipitate
bromine ion gives a cream precipitate
an iodide ion gives a yellow precipitate.

Question 7

test for chlorine

Answer 7

bleaches damp blue litmus paper white.