2 (a) (i) Which of the following is the formula for a molecule of butane?
Put a cross (X) 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 (X) in the box next to your answer.
A C₄H₁₀
B C₈H₁₈
C C₃H₈
D C... 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 (X) 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?
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct answer is A, C₄H₁₀, which is the molecular formula for butane.
Step 2
Draw the structure of a molecule of propene, showing all covalent bonds.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The structure of propene (C₃H₆) consists of three carbon atoms connected in a chain with a double bond between the first two carbon atoms. The structural formula can be represented as follows:
H H
\ /
C=C
/ \
H C
/
H
In this structure, each carbon is bonded to the required number of hydrogen atoms, ensuring that all valencies are satisfied.
Step 3
Complete the sentence by putting a cross (X) in the box next to your answer.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
In the reaction where ethanol is converted to ethanoic acid, ethanol is C, oxidised.
Step 4
Describe what you would see when solid sodium carbonate is added to dilute ethanoic acid.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
When solid sodium carbonate is added to dilute ethanoic acid, you would observe effervescence due to the production of carbon dioxide gas. This happens as the carbonate reacts with the acid, leading to bubbling and fizzing.
Step 5
Complete the balanced equation for this reaction.
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The balanced equation for the reaction between ethanoic acid (CH₃COOH) and ethanol (C₂H₅OH) to produce ethyl ethanoate (C₂H₅COOCH₃) and water (H₂O) is:
