What is pka value for sodium bicarbonate?

Answer 1

There are two answers: bicarbonate has two pKa's - because bicarbonate can gain a proton to become carbonic acid or lose a proton to become carbonate. Two reactions; two pKa's. The pKa for bicarbonate carbonic acid reaction is 6.4 The pKa for bicarbonate carbonate reaction is 10.3 Both pKa's are temperature sensitive.

Answer 2

Pka, (acid-ionization constant) is a measure of strength of an acid in a solution and is the equilibrium constant chemical reaction dissociation in acid based reactions. Sodium chloride or "table salt" has strong bases and acids and would not need Pka.

Answer 3

Sodium chloride, NaCl, is not an acid so it does not have a Ka or pKa value. Sodium chloride is a neutral salt.