QQuestionChemistry
QuestionChemistry
It is said that HClO₄ is a strong acid, whereas HClO₂ is a weak acid. What does this mean in terms of the extent to which the two substances are ionized in solution?
12 months agoReport content
Answer
Full Solution Locked
Sign in to view the complete step-by-step solution and unlock all study resources.
Step 1:I'll solve this problem step by step, explaining the difference between strong and weak acids in terms of their ionization.
Step 2:: Define Acid Ionization
A strong acid completely (or almost completely) dissociates in water, while a weak acid only partially dissociates.
Step 3:: Ionization of HClO₄ (Perchloric Acid)
HClO_{4} \rightarrow H^{+} + ClO_{4}^{-}
For a strong acid like HClO₄, the ionization is essentially 100% complete. This means when dissolved in water, the reaction goes essentially to completion:
Step 4:: Ionization of HClO₂ (Chlorous Acid)
HClO_{2} \rightleftharpoons H^{+} + ClO_{2}^{-}
For a weak acid like HClO₂, the ionization is only partial. The reaction establishes an equilibrium:
Step 5:: Quantitative Difference
- HClO₄: Virtually 100% of molecules dissociate into ions - HClO₂: Only a small fraction (typically 1 - 5%) of molecules dissociate into ions
Step 6:: Practical Implications
- Strong acids like HClO₄ produce more H⁺ ions in solution - Weak acids like HClO₂ produce fewer H⁺ ions in solution
Final Answer
The difference in ionization means that HClO₄ completely breaks apart into ions when dissolved in water, while HClO₂ only partially dissociates, leaving most molecules in their molecular form in solution.
Need Help with Homework?
Stuck on a difficult problem? We've got you covered:
- Post your question or upload an image
- Get instant step-by-step solutions
- Learn from our AI and community of students