Multiple choice

Directions: Use the following information to answer the question.

According to Arrhenius concept, a stronger acid produces greater number of H+ ions in the aqueous solution and vice-versa.

Out of 0.1 M HNO3, 0.1 M CH3COOH, 0.1 M HCl and 0.1 M H2SO4, which is the strongest acid?

  1. 0.1 M HCl

  2. 0.1 M H2SO4

  3. 0.1 M HNO3

  4. 0.1 M CH3COOH
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Concentration of hydrogen ion [H+] in 0.1 M HNO3 = 0.1 M 0.1 M CH3COOH = Less than 0.1 M because it is a weaker acid. 0.1 M HCL = 0.1 M 0.1 M H2SO4 = 0.2 M [because it ionises as H2SO4 ⇌ 2H+ + SO42-] [H+] = 2 × [H2SO4] = 2 × 0.1 = 0.2 M Hence, 0.1 M H2SO4 is the strongest acid.

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