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Tests for Ions and Gases (2) (Ammonia (Turns damp red litmus paper blue,…
Tests for Ions and Gases (2)
Oxygen
Hydrogen peroxide --> water + oxygen
2H2O2 --> 2H2O + O2
Put magnesium oxide and hydrogen peroxide in a test tube
Glowing splint relights
Hydrogen
Lighted wooden splint makes popping sound in test tube of hydrogen (squeaky pop)
Put magnesium and HCl in test tube
Mg + 2HCl --> MgCl2 + H2
Carbon Dioxide
CaCO3 + 2HCl --> CaCl2 + CO2 + H2O
Put HCl and calcium carbonate in beaker- seal and put tube going into limewater
turns limewater milky
Ammonia
Turns damp red litmus paper blue
Turns damp universal indicator paper purple
Has a characteristic sharp choking smell
Chlorine
Makes damp starch-iodide paper turn blue-black
Makes damp blue litmus paper red
then bleaches in white
Has a characteristic sharp choking smell