EXAM STYLE - how to test for...

Question 1

lithium

Answer 1

flame test - goes crimson

Question 2

copper

Answer 2

flame test - goes green

Question 3

calcium

Answer 3

flame test - goes orange-red

Question 4

potassium

Answer 4

flame test - goes lilac

Question 5

sodium

Answer 5

flame test - goes yellow

Question 6

iron III

Answer 6

add sodium hydroxide solution - goes brown

Question 7

iron II

Answer 7

add sodium hydroxide solution - goes green

Question 8

copper II

Answer 8

add sodium hydroxide solution - goes blue

Question 9

magnesium, calcium

Answer 9

add sodium hydroxide solution - white precipitate

Question 10

aluminium

Answer 10

add sodium hydroxide solution in excess - white precipitate dissolves

Question 11

chloride

Answer 11

add silver nitrate solution and dilute nitric acid - goes white

Question 12

bromide

Answer 12

add silver nitrate solution and dilute nitric acid - goes cream

Question 13

iodide

Answer 13

add silver nitrate solution and dilute citric acid - goes yellow

Question 14

carbonate

Answer 14

add dilute acid e.g. dilute hydrochloric acid - limewater goes cloudy

Question 15

sulphate

Answer 15

add barium chloride and dilute hydrochloric acid - white precipitate formed