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Final answer:A solid formed from a solution during a chemical reaction is called a precipitate, which results from a process known as a precipitation reaction.Explanation:A solid that forms from a solution during a chemical reaction is known as a precipitate. When ions in a solution react and produce an insoluble substance, this process is termed a precipitation reaction. One common example of precipitation is when a colorless solution of lead (II) nitrate is mixed with a colorless solution of potassium iodide, resulting in the formation of a yellow solid precipitate.Solutions, which are homogeneous mixtures, can exist in different phases. They are composed of a solvent, the substance in greater amount which determines the solution's state, and one or more solutes, which are present in lower concentrations than the solvent. The intimate mixing of these components often results in single-substance-like behavior, making the system uniform at the molecular level....