Chemical analysis

Question 1

Lithium flame test

Answer 1

Crimson

Question 2

Sodium flame test

Answer 2

Yellow/ orange

Question 3

Potassium flame test

Answer 3

Lilac

Question 4

Calcium flame test

Answer 4

Brick red

Question 5

Barium flame test

Answer 5

Apple green

Question 6

Copper flame test

Answer 6

Green/ blue

Question 7

Strontium flame test

Answer 7

Red

Question 8

Copper with sodium hydroxide

Answer 8

Blue ppt

Question 9

Iron 2 with sodium hydroxide

Answer 9

light green ppt turns brown

Question 10

Iron 3 with sodium hydroxide

Answer 10

Orange to dark orange solid

Question 11

Ammonium with sodium hydroxide

Answer 11

Ammonia gas produces ( mixture must be warmed)

Question 12

Aluminium with sodium hydroxide

Answer 12

Clear to cloudy precipitate back to clear

Question 13

Calcium with sodium hydroxide

Answer 13

Clear to cloudy solid which doenst redissolve

Question 14

Testing for sulphates

Answer 14

Add HCl to BaCl2, if a sulphate is added a white precipitate forms otherwise NCR

Question 15

Testing for halides

Answer 15

Add AgNO3 to HNO3, if chloride is added white ppt, if bromide is added cream ppt, if iodide is added yellow ppt

Question 16

Testing for carbonates

Answer 16

Add HCl if carbonate is added CO2 gad is formed and turns lime water cloudy