Chapter 4.3: Acid Dissociation Constants, pKa, and the Relative Strengths of Acids and Bases Flashcards
If the pH of a buffered aqueous solution is higher than the acid pKa, will the acid be protonated or deprotonated?
For a given acid, it will be predominantly deprotonated if the pH of a buffered aqueous solution is higher than the acid pKa
What is the formula for pKa?
pKa = -log10Ka
Describe the relationship between pKa value and strength of acid
the larger the value of pKa, the weaker the acid o the smaller the value of pKa, the stronger the acid
Describe the relationship between strength of acid and strength of conjugate base
the weaker the acid, the stronger its conjugate base o the stronger the acid, the weaker its conjugate base
If the pH is lower than the pKa, will the acid be protonated or deprotonated?
If the pH is lower than the pKa, the acid will be predominantly protonated
What is the acid dissociation constant?
Ka = Keq[H2O] = ([H3O+][A-])/[HA]