Provide the balanced neutralization reaction of an organic acid present in the soil, formic acid (HCOOH) with lime (Ca(OH)₂), a base used for neutralizing acidic soil.

Aqueous solutions of a cation (green) and anion (red) are mixed together, resulting in the formation of a solid. Identify the ions that can possibly cause the reaction.

Consider the following neutralization reaction:

Ba(OH)_2(aq) + 2 HNO_3(aq) → X + H₂O_(l)

When this equation is completed and balanced, which of the following would replace "X"?