University:
College
Course:
College Chemistry
Academic year:

2023
Views:

15

Pages:

2
Author:

anon

Identification of Ion and Gases Use the following tests to identify: aqueous cations: • ammonium, copper(II), iron(II), iron(III) and zinc by means of aqueous sodium hydroxide and aqueous ammonia as appropriate. (Formulae of complex ions are not required.) Anions: • carbonate by means of dilute acid and then limewater, • chloride by means of aqueous silver nitrate under acidic conditions, • nitrate by reduction with aluminium, • sulfate by means of aqueous barium ions under acidic conditions, gases: • ammonia by means of damp red litmus paper, • carbon dioxide by means of limewater, • chlorine by means of damp litmus paper, • hydrogen by means of a lighted splint, • oxygen by means of a glowing splint. Learn the stuff Carbon dioxide by means of limewater, Add limewater into solution. If it changes to a cloudy color, then Carbon Dioxide is present. Hydrogen by means of a lighted splint Light a splint in front of the thing you suspect to have hydrgoen. If you hear a squeaky “pop” sounds, then Hydrogen is present. Oxygen by means of a glowing splint. Light a glowing splint in front of the thing you suspect to contain oxygen. If the thing relights, then oxygen is present