1Report - 2 CO 3 (2.00 g) Lab Equipments 1. Digital balance...

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Date: September 16, 2010 Title: Gravimetric Analysis of a Metal Carbonate Purpose: The purpose of this experiment is to find the identity of an unknown group 1 carbonate by reacting it with calcium chloride. This experiment is very useful for real-life applications such as encountering an unknown solution and wanting to find its identity. Through gravimetric analysis, the unknown carbonate’s identity and formula weight can be found. Hypothesis: The hypothesis is that the identity and mass of the unknown metal carbonate can be found through the double-displacement precipitation reaction. This can be accomplished because with the resulting precipitate, the molar mass of the unknown metal carbonate can be found using the mole ratios from the balanced equation for this reaction. This would lead to its identity. Materials: Chemicals 1. 0.2 M CaCl 2 (125 ml) 2. Tap water (200 ml) 3. Unknown carbonate sample M
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Unformatted text preview: 2 CO 3 (2.00 g) Lab Equipments 1. Digital balance (0.01 g precision) 2. 3, Beakers (400 ml) 3. Alcohol burner 4. 1, Crucible (15 ml) 5. Crucible tongs 6. Desiccator 7. Filter funnel 8. Filter paper 9. 2, Glass stirring rods 10. 1, Graduated cylinder (250 ml) 11. 2, Heat-resistant pads 12. Ring stand and iron ring 13. 1, Spatula 14. Wash bottle Procedures: 1. Set up an alcohol burner on a ring stand beneath an iron ring. 2. Place a heat resisting pad on the iron ring and a dry crucible on top of the pad. 3. Place a heat resisting pad on the iron ring and a dry crucible on top of the pad. 4. Light the alcohol burner for about one minute heating the crucible. 5. After allowing the crucible to cool off, use crucible tongs to move the crucible into a balance. 6. Measure the mass of the clean, empty crucible to the nearest 0.01 g....
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