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Chapter 4.3: Acid Dissociation Constants, pKa, and the Relative Strengths of Acids and Bases

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Total cards: 6•Content version: v4•Public deck•Updated: 8/1/2026

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#1
Front (Question)

If the pH of a buffered aqueous solution is higher than the acid pKa, will the acid be protonated or deprotonated?

Back (Answer)

For a given acid, it will be predominantly deprotonated if the pH of a buffered aqueous solution is higher than the acid pKa

#2
Front (Question)

What is the formula for pKa?

Back (Answer)

pKa = -log10Ka

#3
Front (Question)

Describe the relationship between pKa value and strength of acid

Back (Answer)

the larger the value of pKa, the weaker the acid o the smaller the value of pKa, the stronger the acid

#4
Front (Question)

Describe the relationship between strength of acid and strength of conjugate base

Back (Answer)

the weaker the acid, the stronger its conjugate base o the stronger the acid, the weaker its conjugate base

#5
Front (Question)

If the pH is lower than the pKa, will the acid be protonated or deprotonated?

Back (Answer)

If the pH is lower than the pKa, the acid will be predominantly protonated

#6
Front (Question)

What is the acid dissociation constant?

Back (Answer)

Ka = Keq[H2O] = ([H3O+][A-])/[HA]