Question

What is fractional precipitation?

   What is fractional precipitation?

Chemistry

Kenneth W. Whitten,… 9th Edition

Chapter 20, Problem 34

Instant Answer

Solved by Expert Lijeesh Krishnan

03/16/2023

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In mathematical terms, fractional precipitation is a method used for separating elements or compounds with similar solubility. \[ \text{Fractional Precipitation} = \text{Method for separating elements or compounds with similar solubility} \] Show more…

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Key Concepts

Fractional Precipitation

Fractional precipitation is a separation technique used to isolate ions or compounds from a solution based on slight differences in their solubility. By carefully controlling the addition of a precipitating agent, the compound with the lowest solubility is selectively precipitated first, leaving others in solution. This gradual approach allows for the sequential separation of species from a mixture.

Precipitation Reactions

Precipitation reactions occur when a soluble compound reacts with another reagent to form an insoluble product, known as a precipitate. These reactions are governed by the solubility rules and the solubility product (Ksp), which determine the conditions under which a compound will begin to precipitate from solution.

Solubility and Solubility Product (Ksp)

Solubility is the property that defines how much of a substance can dissolve in a given solvent at a specific temperature. The solubility product (Ksp) is a constant that quantifies the equilibrium between a solid and its ions in a saturated solution. In fractional precipitation, differences in Ksp values among compounds are exploited to achieve selective precipitation.

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