What common carboxylic acid does vinegar contain?
2 answers:
<u>Answer:</u> The correct answer is acetic acid.
<u>Explanation:</u>
Vinegar is an organic compound which is used in the kitchen in food items. The chemical formula for this compound is
It is the common name for a compound named as acetic acid.
For the given options:
Citric acid: The chemical formula for this acid is
Hydrochloric acid: The chemical formula for this acid is HCl.
Nitric acid: The chemical formula for this acid is
Hence, the correct answer is acetic acid.
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Answer:
Butan-2-one
Explanation:
1. 1700 cm⁻¹
A strong peak near 1700 cm⁻¹ is almost certainly a carbonyl (C=O) group.
2. Triplet-quartet
A triplet-quartet pattern indicates an ethyl group.
The 2H quartet is a CH₂ adjacent to a CH₃. The peak normally occurs at δ 1.3, but it is shifted 1.2 ppm downfield to δ 2.47 by an adjacent C=O group.
The 3H triplet at δ 1.05 is the methyl group. It, too, is shifted downfield from its normal position at δ 0.9. The effect is smaller, because the methyl group is further from the carbonyl.
3. 3H(s) at δ 2.13
This indicates a CH₃ group with no adjacent hydrogen atoms.
It is shifted 0.8 ppm downfield to δ 2.13 by the adjacent C=O group.
4. Identification
The identified pieces are CH₃CH₂-, -(CO)-, and -CH₃. There is only one way to put them together: CH₃CH₂-(C=O)-CH₃.
The compound is butan-2-one.
