Final answer:
The product of the reaction between hydrochloric acid (HCl) and potassium hydroxide (KOH) is water, represented by the chemical formula H₂O. This is a typical acid-base neutralization reaction.
Step-by-step explanation:
When hydrochloric acid (HCl) and potassium hydroxide (KOH) react together in an aqueous solution, the reaction that occurs is a typical acid-base neutralization. The balanced chemical equation for this reaction is:
HCl(aq) + KOH(aq) → H₂O(l) + KCl(aq)
From the equation, we can see that the products are water (H₂O) and potassium chloride (KCl). Therefore, the correct compound listed as a product of this reaction is water, option (a) H₂O. Potassium hydroxide and hydrochloric acid are the reactants, not the products, and potassium chloride, although it is also a product, is not one of the options provided.