Lab

• Ammonia NH2, turns damp red litmus paper blue,
• carbon dioxide, CO2, gives a white precipitate with limewater (ppt. dissolves with excess CO2)
• chlorine, Cl2, bleaches damp litmus paper
• hydrogen, H2 oxygen ‘pops’ with a lighted splint
• oxygen, O2, relights a glowing splint
• carbonate, CO3 2- ion, liberates CO2 by dilute acids
• chloride, Cl –(aq) gives white ppt. with Ag+(aq) (soluble in NH3(aq))
• bromide, Br –(aq)gives cream ppt. with Ag+(aq) (partially soluble in NH3(aq))
• iodide, I –(aq)gives yellow ppt. with Ag+(aq) (insoluble in NH3(aq))
• nitrate, NO3–(aq)- NH3 liberated on heating with OH–(aq) and Al foil
• nitrite, NO2–(aq), NH3 liberated on heating with OH–(aq) and Al foil
• sulfate, SO42–(aq) gives white ppt. with Ba2+(aq) (insoluble in excess dilute strong acids)
• sulfite, SO32–(aq)

  gives white ppt. with Ba2+(aq) (soluble in excess dilute strong acids)