Inorganic tests

Question 1

Solid halide + concentrated sulfuric acid precautions

Answer 1

• must be carried out on a small scale
• carried out in fume cupboard

Question 2

solid chloride + conc sulphuric acid

Answer 2

• steamy fumes (white fume)
  HCl

Question 3

solid bromide + conc sulphuric acid

Answer 3

• steamy fumes, brown vapour
  HBr, Br2, SO2(colourless)

Question 4

solid iodide + conc sulphuric acid

Answer 4

• steamy fumes
• purple vapour
• black solid
• yellow solid
  HI, I2, S, H2S(colourless)

Question 5

precautions of silver nitrate test

Answer 5

• anions such as carbonates that would form ppt with silver nitrates are removed by dding dilute nitric acid before silver nitrate

Question 6

chloride + silver nitrate

Answer 6

white ppt (AgCl)

Question 7

chloride + silver nitrate + dil ammonia

Answer 7

soluble

Question 8

bromide + silver nitrate

Answer 8

cream ppt (AgBr)

Question 9

bromide + silver nitrate + dilute ammonia

Answer 9

insoluble

Question 10

bromide + silver nitrate + conc ammonia

Answer 10

soluble

Question 11

iodide + silver nitrate

Answer 11

pale yellow ppt (AgI)

Question 12

iodide + silver nitrate + dil ammonia

Answer 12

insoluble

Question 13

iodide + silver nitrate + conc ammonia

Answer 13

insoluble

Question 14

sulphate (VI) SO42- + barium chloride

Answer 14

white ppt BaSO4

Question 15

sulphate (IV) SO32- + barium chloride

Answer 15

white ppt BaSO3

Question 16

carbonate + barium chloride

Answer 16

white ppt (BaCO3)

Question 17

when dil HCl added to the anion solution before the addition of aq barium chloride

Answer 17

only sulphate (VI) anion will form precipitate
other anions will dissolve