1. Title: Reacting Metals with Oxygen
WALT: Predict the pH of metal and non-metal oxides

2. Today we are going to see what happens when some metals and non-metals combine with oxygen
Metals we will look at
Non metals we will look at
Magnesium
Carbon
Sodium
Sulphur

3. Demonstrations – Metal Oxides:
Magnesium burning in air
What do you observe about the flame?
What does the colour of the water tell you when you drop the burnt magnesium in with some universal indicator?
What is the word equation for this?
Sodium burning in water and air
What does the colour of the Universal indicator tell you?
Which gas was given off?
What is the equation for this?
What do you conclude about the pH of metal oxides?

4. Demonstration – Non Metal Oxides
Burning of sulphur to get sulphur dioxide
What colour does it turn the universal indicator and what does this tell us?

5. You will burn 2 candles and see what happens1. 2.
Water with Universal indicator
Limewater
Which gas is given off by the candle and was it acid or alkaline?

6. Now complete the following questions about metal extraction
pp. 31 and 33 of KS3 Science “Materials” Use sub-headings and write in full sentences

7. Plenary – copy and complete:
Many elements combine with oxygen in a process called oxidation to form compounds called…………
Burning or combustion needs thermal energy to get it started.
Metal oxides such as …………………… are alkaline, whereas non-metal oxides such as carbon dioxide are ………………….