Experiment production and properties of ethene (Organic Practical)

Question 1

what is the function of the glass wool

Answer 1

glass wool holds ethanol in place preventing it from reaching the aluminium oxide

Question 1

state the chemical formula for ethene

Answer 1

C2H4

Question 2

state and explain 2 safety precautions which should be observed when carrying out this experiment

Answer 2

• wear safety goggles risk of explosion
• remove tube before you stop heating to prevent such back and possible explosion
• wear heat proof gloves to prevent burns

Question 3

write a balanced equation for the reaction involved in this preparation

Answer 3

C2H5OH = C2H4 + H2O

Question 4

what is meant by the term unsaturated

Answer 4

contains at least one double or triple carbon to carbon bond

Question 5

describe how you would carry out another test to confirm that ethene is unsaturated

Answer 5

> shake with bromine water - decolourises it from red-brown to colourless

                                                  OR

> shake with KMnO4- decolourises it from purple to colourless

Question 6

describe the flame that would be observed when a combustion test is carried out on ethene gas

Answer 6

luminous or yellow

Question 7

write a balanced equation for the combustion of ethene in excess oxygen

Answer 7

C2H4+3O2 = 2CO2 + 2H2O + heat

Question 8

give the name or chemical formula of the solid used in the preparation of ethene

Answer 8

Aluminium oxide