Question

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Which is a description of a precipitation reaction?














A.

Potassium iodide is added to lead nitrate to produce an insoluble yellow solid, lead iodide.











B.

Water decomposes to form hydrogen and oxygen.











C.

Sulfuric acid combines with sodium hydroxide to produce water and sodium sulfate.











D.

Lead combines with oxygen to produce lead oxide

Answer 1

@gfear

Answer 2

A precipitation reaction refers to the formation of an insoluble salt when two solutions containing soluble salts are combined. The insoluble salt that falls out of solution is known as the precipitate, hence the reaction's name. Precipitation reactions can help determine the presence of various ions in solution.

Based on this definition I'd go with A.

Answer 3

thx
medal 4 u