Question

Identify the acid and base which form sodium hydrogen carbonate. Write chemical equation in support of your answer. State whether this compound is acidic, basic or neutral. Also write it's pH value.

Answer 1

NaHCO3 is a product of a strong base and a weak acid reaction. Thus it has weak basic properties. HCO3- ion is actually amphoteric, which means it can act as a base or an acid. But it is weaker than a strong acid or a strong base.

so it should be basic and so the pH value would be (6.37 + 10.25)/2 = 8.31

as ....pH = (pKa1 + pKa2)/2. where Ka1 & Ka2 are dissociation constants of the conjugate acid of amphiprotic species.

Answer 2

NAH CO3 IS THE IS BASIC AND PH VALUE IS 13 TO 14