5:31 ← Can you explain why A. is a weak acid here? Expert Answer Step1 a) Acidity of a acid depends on how much H+ ions it produces after dissolving in water. Step2 b) Among the following HNO3 completely dissociates in water. So it is a strong acid. But H3PO4 is a weak acid. Because it partially dissociates in water and produces small amount of H+ ions. Lower is the hydrogen ion concentration lower is the acidity. pKa value of H3PO4 is around 2.4. pKa value of a strong acid is below zero. The lower the pKa the stronger is the acid.

Introduction to General, Organic and Biochemistry
11th Edition
ISBN:9781285869759
Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Publisher:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Chapter9: Nuclear Chemistry
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How do we know that the pka value is around 2.4?
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