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precipitant (noun) substance that causes the solvent in a solution to separate
A precipitant causes a solid substance in a solution to separate out. When you add a precipitant to a solution, it causes the soluble solid in the solution to appear separately.
- As they could not find a precipitant, they found it difficult to separate the soluble solid from the solution.
- Solids that are dissolved in a solution can be separated out by precipitants. When a precipitant is added the solid appears separately.