Chemistry Regents Practice Test 2025 – The All-in-One Guide to Exam Success!

Question: 1 / 400

Which of the following best describes a precipitate?

A gas formed in a reaction

A solid that settles out of a liquid mixture

A precipitate is best described as a solid that forms and settles out of a liquid mixture during a chemical reaction. This occurs when certain conditions are met, such as when two soluble reactants combine to form an insoluble compound that cannot remain dissolved in the solution, leading to its separation as a solid.

In this context, a precipitate is not a gas, which means that the formation of gases during reactions, while important, does not define a precipitate. Similarly, while liquids can be produced in reactions, they do not characterize a precipitate. Lastly, an element being released during a reaction refers to a change in the chemical composition but does not relate to the formation of a solid from a liquid mixture. Thus, the definition aligns specifically with the formation of a solid that separates from the mixture.

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A liquid produced in a reaction

An element released during a reaction

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