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2. Combustion of polystyrene

Your teacher will have shown you the following experiment.

Combustion polystyrene

Does the polystyrene burn easily?

Write down what you see when the polystyrene burns.

Name the products of combustion of polystyrene and write a word equation for the reaction.

How did your teacher identify the presence of carbon dioxide?

How can the combustion of polystyrene be dangerous?

Given that the chemical formula of polystyrene is (CH2CHC6H5)n (n is a large number) try and write a balanced chemical equation for the reaction.

 

 

 

PHYSICAL SCIENCE

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A Closer Look at Organic Materials

1. Combustion of paper

Set up the apparatus as shown below:

 

Combustion of paper

 

Turn on the vacuum pump and carefully ignite the paper.

Record your observations in the table

 

 

Observations

Explanation

Surface of filter funnel

 

 

Anhydrous copper sulfate

 

 

Limewater

 

 

 

Questions:

Apart from the products identified above, what else is produced during the reaction?

Write a word equation for the reaction

Which elements is paper made up from? Explain how the results of the experiment shows this.

 

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