pKa values to know Flashcards
What is the pKa value of HI?
-10
What is the pKa value of HBr?
-8
What is the pKa value of HCl?
-7
What is the pKa value of HF?
3
What is the pKa value of an oxocarbenium ion (protonated carbonyl)?

-6 to -8
What is the pKa value of an oxonium ion (protonated alcohol/ether)?

-2
What is the pKa value of a hydronium ion (protonated water or an aqueous solution of any stronger acid)?

-2
What is the pKa value of carboxylic acid? Or a pyridinium ion?

5
What is the pKa value of phenol? Or an ammonium ion?

10
What is the pKa value of a primary or secondary amide?

15
What is the pKa value of water?

16
What is the pKa value of alcohols?

16-18
What is the pKa value of a-aldehyde, a-ketone?

20
What is the pKa of a terminal alkyne?

25
What is the pKa of an a-ester, a-amide?

25
What is the pKa of hydrogen (H2)?

36
What is the pKa of ammonia, primary amine, or secondary amine?

40
What is the pKa of allylic/benzylic? (e.g., PhCH3)

41
What is the pKa value of arene?

43
What is the pKa of alkene/vinylic?

50
What is the pKa value of alkane?

50+