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Practical Investigations I

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Heating Sugar

Set up the apparatus as shown below

Heating Sugar

Heat the sugar strongly and record all observations.

Using a match try and ignite any gas that leaves the test tube.

Results

Sugar

Observations

Explanation

Appearance before heating.

 

 

Appearance during heating.

 

 

Appearance after heating

 

 

 

Name the combustible gas.

Write a word equation for the reaction.

 

 

 

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A Closer Look at Organic Materials

Comparing the combustion of a candle with that of ethanol

 

Combustion of a candle

Combustion of ethanol

Combustion of a candle

Combustion of ethanol

  1. Light the wick of the candle.

  2. Observe the colour of the flame.

  3. Place a beaker over the candle and record your observations.

  4. Leave the beaker to cool, then add 5ml of lime water and shake.

  1. Pour 2cm3 of ethanol into the evaporating basin and ignite carefully with a match.

  2. Observe the colour of the flame.

  3. Place a beaker over the candle and record your observations.

  4. Leave the beaker to cool, then add 5ml of lime water and shake.

Observations

Observations

Colour of flame:

Colour of flame:

What did you see on the surface of the beaker?

What did you see on the surface of the beaker?

1.

1.

2.

2.

What happened to the limewater? Explain.

What happened to the limewater? Explain.

Questions

Questions

1. Name the products of combustion.

1. Name the products of combustion.

2. What type of combustion is the combustion of a candle?

2. What type of combustion is the combustion of ethanol?

3. Write a word and balanced symbol equation for the reaction.

3. Write a word and balanced symbol equation for the reaction.

 

 

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