(i) Prepare oxygen safely by decomposition of hydrogen peroxide solution. Put 20 mL
hydrogen peroxide into a 100 mL bottle. Fix a delivery tube to the bottle. Add two spatulas
of manganese dioxide and oxygen bubbles off for collection.
(ii) Oxygen is colourless and has no smell. To test whether the test-tube contains oxygen,
light a splint of dry wood, blow out the flame leaving a glowing splint then put the glowing
splint in a test-tube of oxygen. The glowing splint bursts into flame. This experiment is
called the glowing splint test.
(iii) Use an L-shape piece of nichrome wire with a shield to fit on the top to protect your
hand. Fix steel wool into a loop in the lower end of the Nichrome wire. Heat the steel wool
to red hot in a Bunsen burner flame then inserts it quickly into a test-tube of oxygen.
(iv) Fix a small piece of charcoal into the loop in the lower end of the Nichrome wire. Ignite
the charcoal in the Bunsen burner flame and then insert it quickly into another test-tube of
oxygen.
(v) Dip the loop in the lower end of the Nichrome wire into sulphur powder. Ignite the
sulphur powder in a Bunsen burner flame and then insert it quickly into another test-tube of
oxygen.
sharon kalunda answered the question on April 12, 2019 at 07:24
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