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Lesson Worksheet: Filtration and Crystallization Chemistry
In this worksheet, we will practice separating mixtures using filtration and crystallization, deciding the apparatus needed, and determining when each should be used.
Which of the following methods is the most appropriate for recovering a solute from a solution containing other, more soluble solutes?
Which of the following methods is the most appropriate for separating a solid from a liquid?
Which technique could be used to obtain pure solid copper sulfate from a solution of copper sulfate and sodium chloride in water?
Which of the following methods is most appropriate for separating a solute from a simple mixture of solvent and solute?
Which item of glassware is illustrated below?
- AVolumetric flask
- BErlenmeyer flask
- CBüchner flask
- DDistillation flask
- ERound-bottom flask
A mixture of sand and sodium chloride is commonly known as rock salt. Which of the following shows the correct order needed to separate sodium chloride from rock salt?
- ADissolution in water → filtration → crystallization
- BFiltration → dissolution in water → distillation
- CFiltration → crystallization → dissolution in water
- DCrystallization → dissolution in water → filtration
- EDissolution in water → crystallization → filtration
The given diagram shows the setup for a crystallization process. When should the heat be removed from the evaporating dish?
- AWhen crystals start to form in the dish
- BWhen the solution starts to boil
- CWhen the crystals start to combust
- DOnce the temperature reaches
- EAfter heating for exactly 5 minutes
Why does heating a solution, and evaporating some of the solvent, induce crystallization?
- AHeating causes the solute to oxidize and form crystals.
- BThe solution becomes supersaturated and, upon cooling, causes crystals to form.
- CA higher temperature reduces the amount of solute that dissolves in a solvent.
- DThe energy needed to evaporate the solvent is taken from the energy of crystallization.