Cations

Question 1

What is used during precipitation reactions

Answer 1

NaOH

Question 2

What colour precipitate does iron 2 have

Answer 2

Green

Question 3

What colour precipitate does Fe 3 have

Answer 3

brown

Question 4

What colour precipitate does copper have

Answer 4

blue

Question 5

What colour precipitate does calcium have

Answer 5

white

Question 6

What colour precipitate does aluminium have

Answer 6

white

Question 7

How do you tell the difference between the 2 white precipitates

Answer 7

add excess NaOH, AlOH forms colourless solution

Question 8

How can you test for Ammonium ions

Answer 8

add to solution, heat if NH3 gas then present, sharp smell

Question 9

What is the test for ammonia gas

Answer 9

damp red litmus paper turns blue