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Acid-Base equilibrium will lie toward the side of the weaker acid and base. Predict the position...

Acid-Base equilibrium will lie toward the side of the weaker acid and base.

Predict the position of equilibrium for the following reactions:

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Homework Answers

Answer #1

CH3COOH

+

NH3

CH3COO-

+

NH4+

acid

base

base

acid

pKa ~5

pKa~9

Equilibrium lies to the right: →

C2H5NH2

+

H2O

C2H5NH3+

OH-

base

acid

acid

base

pKa ~16

pKa ~11

←   Equilibrium lies to the left *

NH3

+

HCN

NH4+

+

CN-

base

acid

acid

base

pKa ~9

pKa ~9

pK's the same, equilibrium has approximately equal amounts of product and reactant.
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