2 (a) (i) Which of the following is the formula for a molecule of butane?
Put a cross (✗) in the box next to your answer - Edexcel - GCSE Chemistry - Question 2 - 2013 - Paper 1
Question 2
2 (a) (i) Which of the following is the formula for a molecule of butane?
Put a cross (✗) in the box next to your answer.
☐ A C₄H₁₀
☐ B C₃H₈
☐ C C₂H₆
☐ D ... show full transcript
Worked Solution & Example Answer:2 (a) (i) Which of the following is the formula for a molecule of butane?
Put a cross (✗) in the box next to your answer - Edexcel - GCSE Chemistry - Question 2 - 2013 - Paper 1
Step 1
Which of the following is the formula for a molecule of butane?
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Answer
The correct answer is A C₄H₁₀. Butane is an alkane with four carbon atoms.
Step 2
Draw the structure of a molecule of propene, showing all covalent bonds.
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Answer
The structure of propene (C₃H₆) can be represented as follows:
H H
\ /
C
/ \
H-C C-H
\ /
H
This representation shows all carbon and hydrogen atoms along with their covalent bonds.
Step 3
Complete the sentence by putting a cross (✗) in the box next to your answer.
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Answer
In this reaction, ethanol is C oxidised. Ethanol loses electrons to form ethanoic acid.
Step 4
Describe what you would see when solid sodium carbonate is added to dilute ethanoic acid.
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Answer
When solid sodium carbonate is added to dilute ethanoic acid, effervescence (bubbles) would be observed due to the release of carbon dioxide gas. The reaction between sodium carbonate and ethanoic acid produces sodium ethanoate, water, and carbon dioxide.
Step 5
Complete the balanced equation for this reaction.
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Answer
The balanced equation for the reaction between ethanoic acid and ethanol to form ethyl ethanoate is:
