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MAKING COPPER: STOICHIOMETRY – I



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Name MAKING COPPER STOICHIOMETRY I PRE LAB ACTIVITIES QUESTIONS Instructions Complete the following pre lab activities questions before coming to lab The instructor will check the pages for completion at the beginning of the lab 1 I have read the Introduction to the experiment and provided my answers to all embedded questions in the spaces provided in the Introduction 2 I have watched the pre laboratory video clip on Stoichiometry and answered all questions See attached sheet s at the end of this document Revised 8 10 10 Chemistry 40 Fall 2010 Page 1 of 8 MAKING COPPER STOICHIOMETRY I OBJECTIVE Part 1 The purpose of this experiment is to verify the mass mole relationship among reactants and products and determine percent yield of the reaction product INTRODUCTION Stoichiometry deals with quantities and chemical reactions You should be able to the following in order to perform stoichiometric calculations 1 Convert between a given substance s mass to mole and vise versa quantities 2 Classify a reaction and predict reaction products 3 Balance chemical reactions 4 Use balanced coefficients in order to calculate any mole or mass quantity 5 Distinguish between excess and limiting reactants Review the above concepts from your textbook SAFETY LAB TECHNIQUES Wear safety goggles at all times 1 Review all safety rules and be conscious of the environment around you If you find someone violating any safety rules talk to your instructor 2 Keep your work area clean free from spilled chemicals and scattered paper towels 3 Dispose of all chemical waste into properly labeled waste containers Be sure that you are clear about chemicals that can be safely disposed down the sink and those that should be properly collected as waste 4 Don t take any more chemicals than you need for an experiment and never return the unused chemical back into the original container Unused chemicals should be properly discarded 5 Work with a partner only if authorized by your instructor Otherwise you are



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