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Question:

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

Solution:

Sodium hydroxide (NaOH) is the base and carbonic acid (H₂CO₃) is the acid which forms sodium hydrogen carbonate (NaHCO₃).
NaOH + H₂CO₃ → NaHCO₃ + H₂O
Sodium hydrogen carbonate is a weak base and its pH is 8.3.