<u>Answer:</u> The chemical equations are written below.
<u>Explantaion:</u>
An acid-base reaction is known as neutralization reaction.
Neutralization reaction is defined as the reaction in which an acid reacts with a base to produce a salt and water molecule.
The chemical equation for the reaction of HCl and NaOH follows:

By Stoichiometry of the reaction:
1 mole of HCl reacts with 1 mole of NaOH to produce 1 mole of sodium chloride and 1 mole of water molecule.
The chemical equation for the dissolution of solid sodium bicarbonate in water follows:

By Stoichiomtery of the reaction:
1 mole of solid sodium bicarbonate reacts with 1 mole of water, to produce 1 mole of aqueous solution of sodium ions and 1 mole of aqueous solution of hydrogen carbonate ions.
An acid is a substance which looses hydrogen ion when dissolved in water and a base is defined as the substance which accepts hydrogen ion.
The chemical equation where hydrogen carbonate is an acid and reacts with water follows:

By Stoichiometry of the reaction:
1 mole of hydrogen carbonate ion reacts with water to produce carbonate ions and hydronium ions.
The chemical equation where hydrogen carbonate is an base and reacts with water follows:

By Stoichiometry of the reaction:
1 mole of hydrogen carbonate ion reacts with water to produce carbonic acid and hydroxide kions.
Hence, the chemical equations are written above.