Vinegar contains ethanoic acid.
(a) Which of these is a use of vinegar?
Put a cross (X) in the box next to your answer.
A fuel
B perfume
C preservative
... show full transcript
Worked Solution & Example Answer:Vinegar contains ethanoic acid - Edexcel - GCSE Chemistry - Question 1 - 2015 - Paper 1
Step 1
Which of these is a use of vinegar?
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
C preservative
Step 2
An indicator can be used to show that ethanoic acid is acidic. Give the name of an indicator that can be used and state its colour in the acid.
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 indicator can be phenolphthalein, which turns colourless in ethanoic acid.
Step 3
Use the gases from the box to complete the sentences. (i) If a bottle of wine is left open, ethanoic acid is formed when ethanol in the wine is oxidised by __________.
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
oxygen
Step 4
Use the gases from the box to complete the sentences. (ii) Ethanoic acid reacts with magnesium to give a gas. When the gas is mixed with air and ignited with a lighted splint, it gives a squeaky pop. This gas is __________.
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
hydrogen
Step 5
Use the gases from the box to complete the sentences. (iii) When sodium carbonate is added to dilute ethanoic acid, effervescence occurs. The effervescence is bubbles of __________.
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
