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What do you mean by a precipitation reaction?

Answer 1

See below.

A precipitate reaction means that during the reaction, solids form from an aqueous solution. Also, precipitation reactions occur when cations and anions in aqueous solution combine.

Here are some examples,

Here you can see that lead(II) cations and iodide anions are the products of the aqueous solution. Looking at the solubility chart, you can see that lead(II) cations and iodide anions do in fact make a solid and also that the sodium cations and nitrate anions are aqueous (as sodium nitrate is soluble).

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Answer 2

Xavier Avery

A precipitation reaction is a type of chemical reaction in which two soluble compounds in a solution react to form an insoluble solid compound, known as a precipitate.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.