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Which of the following acids is the strongest?

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Question: Which of the following acids is the strongest?

Options:

  1. Formic acid
  2. Acetic acid
  3. Propanoic acid
  4. Butanoic acid

Correct Answer: Formic acid

Solution: 

Formic acid (HCOOH) is stronger than acetic acid and other listed acids.

Which of the following acids is the strongest?

Practice Questions

Q1
Which of the following acids is the strongest?
  1. Formic acid
  2. Acetic acid
  3. Propanoic acid
  4. Butanoic acid

Questions & Step-by-Step Solutions

Which of the following acids is the strongest?
  • Step 1: Understand that acids can vary in strength, which means some can donate protons (H+) more easily than others.
  • Step 2: Identify the acids listed in the question. In this case, we have formic acid (HCOOH) and acetic acid (CH3COOH).
  • Step 3: Look up the pKa values of the acids. A lower pKa value indicates a stronger acid.
  • Step 4: Compare the pKa values: Formic acid has a lower pKa than acetic acid, meaning it is a stronger acid.
  • Step 5: Conclude that formic acid (HCOOH) is stronger than acetic acid and any other acids mentioned.
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