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Lesson No: 4 Unit
Title: Simple Chemical Reactions |
Unit No:
7Fd |
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Lesson Title: On Fire |
NC Ref:5-6 |
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Objectives: MX — burning requires oxygen
and makes new substances; oxygen SK— when
materials such as metals burn they form oxides; some products of burning;
extra care needed if materials are burnt in 02; word equations can represent
reactions; fire will only burn when heat, fuel and 02 are present; oxide, word
equation, Fire Triangle CK— some ways
of putting out fires; mass changes that take place during chemical reactions. |
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Lesson outline: Timing: Registration
and starter: What gases are in the air? DEMO BeIl
jar over water with lighted candle floating — discuss that oxygen needed
for the candle to burn and water level moved up about 1/5 (20%) as
02 5-10 used. DEMO TEST FOR OXYGEN — will relight a glowing
splint.
What is needed for something to burn? Oxygen,
heat and fuel — fire triangle. Notes to books — oxygen
20% of air, required for something to burn, test for Draw
fire triangle. 10 Method
for practical — heating copper in air. Take mass of copper before burnt in air and then after. Note colour change. Or could
use 7 Fd12. . PRAC
and clearing up 20 Discuss what was seen — shiny copper metal turns black, increase in mass. What
is the black colour — oxide. A new substance — the product of the reactio Results
and conclusion into books.
Word equation — Copper + Oxygen --> Copper oxide 15 (shiny metal solid) (colourless gas)
(black solid) Work
from page 70 — answer the purple box questions from the book. Could
use the yellow box summary |
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Resources: Heat
proof mats, bunsen burners, metal tongs, pieces of
copper foil (range 1.5cm x 1.5cm to 4cm
x 4cm), accurate balance (2 d.p.), goggles. |
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Homework: research the different types of fire extinguisher. |
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Risk Assessment: |
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