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A group of students prepared ethene, C₂H₄, in the school laboratory using the apparatus shown in the diagram - Leaving Cert Chemistry - Question 1 - 2010
Question 1
A group of students prepared ethene, C₂H₄, in the school laboratory using the apparatus shown in the diagram. The ethene was obtained using an organic liquid X and a... show full transcript
Worked Solution & Example Answer:A group of students prepared ethene, C₂H₄, in the school laboratory using the apparatus shown in the diagram - Leaving Cert Chemistry - Question 1 - 2010
Step 1
Step 2
Step 3
Copy the diagram into your answer-book and complete it by indicating the correct positions of (i) the liquid X, (ii) the solid Y, (iii) the Bunsen burner.
Answer
In the diagram:
- (i) The liquid X should be represented in the horizontal test tube leading to the collection of ethene.
- (ii) The solid Y will be placed in a suitable container towards the heat source (Bunsen burner).
- (iii) The Bunsen burner is positioned below the apparatus providing the necessary heat.
Step 4
How was the liquid X kept in its proper position in the horizontal test tube?
Answer
The liquid X was kept in its proper position by ensuring that the test tube was tilted downwards slightly. This allows the liquid to flow towards the collection point while preventing it from escaping the apparatus.
Step 5
What precaution should have been taken when the Bunsen burner was turned off at the end of the experiment? What could have happened if this precaution was not taken?
Answer
When turning off the Bunsen burner, it is crucial to turn it off only after the gas supply has been turned off. If the gas supply is not shut off before extinguishing the flame, there is a risk of gas accumulation, which can lead to an explosion or fire hazard.
Step 6