When a solution of sodium hydroxide is added to a solution of cobalt chloride, insoluble purple cobalt hydroxide and soluble sodium chloride are formed. Of the following methods, the cobalt hydroxide could best be separated from the sodium chloride by:

evaporation

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filtration

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paper chromatography

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fractional distillation

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Solution

The correct option is D filtration
Since cobalt hydroxide is insoluble and sodium chloride formed is soluble then by the filtration method insoluble residue is separated from the filtrate of sodium chloride in the solution.

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Question 12

Look at the given reaction.
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When a solution of sodium hydroxide is added to a solution of cobalt chloride, insoluble purple cobalt hydroxide and soluble sodium chloride are formed. Of the following methods, the cobalt hydroxide could best be separated from the sodium chloride by:

The correct option is D filtrationSince cobalt hydroxide is insoluble and sodium chloride formed is soluble then by the filtration method insoluble residue is separated from the filtrate of sodium chloride in the solution.

The correct option is D filtration
Since cobalt hydroxide is insoluble and sodium chloride formed is soluble then by the filtration method insoluble residue is separated from the filtrate of sodium chloride in the solution.