Page 48 - Big Ideas Year 10 sciPAD 2025
P. 48
PHOTOCOPYING PROHIBITED
© Silverback Academic Media
48 SCIPAD - BIG IDEAS - BOOK 2
BASIS OF CHEMICAL REACTIONS
Writing Chemical Equations: Metal + Oxygen
When a metal reacts with oxygen a metal oxide is formed.
1. Complete the following word equations.
(a) Zinc + Oxygen
(b) Iron + Oxygen
(c) Sodium + Oxygen
(d) Aluminium + Oxygen
(e) Calcium + Oxygen
(f)
+
Lead oxide
(g) + Lithium oxide
(h) + Copper oxide
(i) + Magnesium oxide
(j) + Beryllium oxide
Testing for the Presence of Oxygen
Aim: To carry out a test for the presence of oxygen gas (O2).
Equipment: A pea-sized amount of manganese dioxide (MnO2), boiling tube, bottle of hydrogen
peroxide (H2O2), safety glasses, wooden splint, Bunsen burner, test tube rack.
Method: 1. Light your Bunsen burner.
2. Add the manganese dioxide to the boiling tube and place it in your test tube rack.
3. Add 2 mL of hydrogen peroxide.
4. Light a splint and let it burn for a while.
5. Blow the splint out and insert the glowing embers into the mouth of the boiling tube.
Insert glowing splint
into the boiling tube
Hydrogen peroxide and
manganese dioxide
producing oxygen
Observations:
If oxygen is present, the glowing splint will
Unchecked Sample Pages
For Review Purposes Only - Photocopying Prohibited
www.scipad.co.nz