Final answer:
In the mixture of potassium chloride and sodium nitrate solutions, no solid precipitate forms because all the involved ions remain soluble in water.
Step-by-step explanation:
When an aqueous solution of potassium chloride is mixed with an aqueous solution of sodium nitrate, no precipitate forms, as all the ions remain soluble in water after reacting.
Neither potassium nor sodium ions react with the nitrate or chloride ions in such a way to form a solid precipitate. Therefore, in the balanced chemical equation for the reaction of these two solutions, there would be no solid present.