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Which of the following structural formulae shows citric acid, also known as 2-hydroxypropane-1,2,3-tricarboxylic acid? (A) O || HO-C-C-C-OH | O | OH | H - HSC - SSCE Chemistry - Question 8 - 2013 - Paper 1
Question 8
Which of the following structural formulae shows citric acid, also known as 2-hydroxypropane-1,2,3-tricarboxylic acid? (A) O || HO-C-C-C-... show full transcript
Worked Solution & Example Answer:Which of the following structural formulae shows citric acid, also known as 2-hydroxypropane-1,2,3-tricarboxylic acid? (A) O || HO-C-C-C-OH | O | OH | H - HSC - SSCE Chemistry - Question 8 - 2013 - Paper 1
Step 1
Identify the correct structural formula for citric acid
Answer
To identify the correct structural formula for citric acid, we need to look for a molecule that contains three carboxylic acid groups (-COOH) and one hydroxyl group (-OH) in its structure. Citric acid has the formula C6H8O7. Its structure comprises three carboxylic acid functional groups attached to a central carbon backbone.
Among the option provided, option A is the only structure that features:
- Three -COOH groups, confirming the presence of carboxylic acids.
- One -OH group, which supports its classification as 2-hydroxypropane-1,2,3-tricarboxylic acid.
Therefore, option A correctly represents citric acid.