The student plans to obtain pure dry crystals of hydrated sodium sulfate.They add the calculated volume of sulfuric acid to 25.0 cm 3of the sodium hydroxide solution to form sodium sulfate solution.Describe what the student should do to obtain pure dry crystals of hydrated sodium sulfate from the solution.
Question
The student plans to obtain pure dry crystals of hydrated sodium sulfate.They add the calculated volume of sulfuric acid to 25.0 cm 3of the sodium hydroxide solution to form sodium sulfate solution.Describe what the student should do to obtain pure dry crystals of hydrated sodium sulfate from the solution.
Solution
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First, the student should heat the sodium sulfate solution gently to evaporate some of the water. This process is called evaporation. The student should stop heating when a concentrated solution is obtained.
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After heating, the student should leave the solution to cool. As the solution cools, crystals of hydrated sodium sulfate will start to form. This process is called crystallization.
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Once the crystals have formed, the student should filter the mixture to separate the crystals from the solution. This can be done using a funnel and filter paper.
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After filtering, the student should rinse the crystals with a small amount of cold distilled water. This is to remove any impurities or remaining solution on the crystals.
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Finally, the student should leave the crystals to dry in a warm place or in a desiccator. After drying, the student will have pure dry crystals of hydrated sodium sulfate.
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