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investigation of a powder

investigation of a powder - Investigation of a Powder...

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Investigation of a Powder Purpose: This experiment will teach us proper techniques of suction filtration, reinforce the technique of weighing and help us determine the percent of barium sulfate in a mixture of barium sulfate and copper sulfate. Introduction: Filtration is the technique used to separate insoluble solid material from a liquid. The solution to be filtered is poured into a filter paper that allows the liquid to pass through but not the solid. The liquid is called the filtrate, while the solid is called the precipitate or crystals. The flow of liquid can be assisted by either gravity or suction. If the solid is a product to be collected, suction filtration is used. Procedure: Obtain an unknown powder in a numbered plastic bag. Write the unknown number in your notebook. Weigh by difference, 4.5-5.2 grams of the unknown sample into a 100mL dry beaker. Add 20mL of deionized water to the beaker. Set the beaker on a hot plate with a setting of 4-5 for 10-15 minutes with occasional stirring using a glass rod.
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