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Precipitation Reactions

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Lesson Focus

Precipitation Reactions


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You will combine two solutions and analyze the reaction to see if a precipitate forms.

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Now You Know

After completing this tutorial, you will be able to complete the following:

  • Observe a reaction in an aqueous solution and state whether a precipitate forms.
  • Explain that a precipitate is a solid formed when two solutions are mixed.
  • Identify the reactants and products in a precipitate reaction equation.
  • Explain that positive (cation) and negative ions (anions) of two different compounds combine to form a precipitate.
  • Describe precipitation as occurring when two or more solutions are combined resulting in a reaction that produces an insoluble product.

Everything You'll Have Covered

A precipitate is a solid, insoluble product that is formed when two solutions chemically react. Precipitation reactions typically involve ionic compounds that have been dissolved in water. These compounds in an aqueous state react and form products that are insoluble in water. A set of solubility rules enables the prediction or explanation of how precipitation reactions work and what products they will produce.

Tutorial Details

Approximate Time 20 Minutes
Pre-requisite Concepts Learners should understand how to write and balance chemical equations. They should also be familiar with ions and solubility.
Course Chemistry
Type of Tutorial Concept Development
Key Vocabulary aqueous, compound, insoluble