Experiment 3 Qualitative Analysis of Anions

Question 1

Reaction of Carbonate and Barium hydroxide

HCl + Na2CO3 <=> 2NaCl + CO2 + H20
Hydrogen chloride + Sodium carbonate <=> Sodium Chloride +Carbon dioxide + Water

CO2 (g) + Ba2+ <=> 2OH- + BaCO3 (s) + H2O
Carbon dioxide (g) + Barium <=> 2OH- + Barium Carbonate (s) + Water

Answer 1

Cloudy white precipitate

Question 2

Confirmation of Nitrate

NO3 − → NH4+ (reduction)
Nitrate → Ammonium

NH4+ + OH- <=>𝑁𝐻3(𝑔)
Ammonium + Hydroxide <=> trihydrogen (g)

Answer 2

Red to blue

Question 3

Reaction of Silver and HCl
Ag+ + Cl- <=> AgCl (s)

Answer 3

White Precipitate

Question 4

Reaction of Sulfate and Barium Chloride

Ba2+ + SO42-4 <=> BaSO4 (s)
Barium Ion + Sulphate <=> Barium sulfate (S)

Answer 4

Cloudy White Precipitate