Determine whether potassium hydrogen tartrate (KHC 4 H 4 O 6 ) is neutral, basic

Question

Determine whether potassium hydrogen tartrate (KHC4H4O6) is neutral, basic, or acidic.
First, what is its Ka when it acts as an acid?

The following are for the diprotic acid, H2C4H4O6:
Ka1 = 1.0 x 10-3 and Ka2 = 4.6 x 10-5. Second, what is its Kb when it acts as a base? Determine whether potassium hydrogen tartrate (KHC4H4O6) is neutral, basic, or acidic.
First, what is its Ka when it acts as an acid?

The following are for the diprotic acid, H2C4H4O6:
Ka1 = 1.0 x 10-3 and Ka2 = 4.6 x 10-5. Second, what is its Kb when it acts as a base?
First, what is its Ka when it acts as an acid?

The following are for the diprotic acid, H2C4H4O6:
Ka1 = 1.0 x 10-3 and Ka2 = 4.6 x 10-5. Second, what is its Kb when it acts as a base?

Explanation / Answer

since pKa2 is less than 7 (4.33) so the given salt is acidic.

when it is acting as a base,

it's Kb*Ka=Kw

or Kb=10^-14/(4.6*10^-5)

=2.17*10^-10

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