Chem Lab #3 Report

Chem Lab #3 Report - Lab #3 Report: Scientific Observations...

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Lab #3 Report: Scientific Observations and Reaction Stoichiometry: The Qualitative Analysis and Chemical Reactivity of Five White Powders Sarah Aistrup Group Members Sec. 425 Cassie Ward
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Introduction: The first purpose of this lab was to determine the limiting reagent and percent yield of a reaction. The second purpose was to identify compounds from one another by their chemical reactivity and physical properties through a series of tests. In the first part of this experiment, a reaction between sodium carbonate and copper chloride will be examined, this reaction is: Na 2 CO 3 (aq) + CuCl 2 (aq) → 2 NaCl (aq) + CuCO 3 (s) Equal masses of sodium carbonate and copper chloride will be reacted to form the product, copper carbonate. Then, by weighing the final product, the theoretical yield, actual product yield, percent yield, and limiting reagent can be identified for this specific reaction. Finding theoretical yield shows the maximum possible amount of product that can be formed. However, most of the time the actual yield, or the amount of product actually obtained from a reaction, varies from the theoretical yield. This can be due to temperature, pressure, or not recovering all of the product- to name a few. The percent yield shows how efficient the given reaction is, and the limiting reagent determines the amount of product that can be formed because it is the first to be used up by a reaction (Chemistry p. 106). In the second part of this experiment, the characteristics of five white compounds, BaCO 3 , BaCl 2 , BaSO 4 , Na 2 CO 3 , and NaCl will be tested. These compounds' solubility, solution pH, and chemical reactivity [with HNO 3 , the sulfate ion (SO 4 2- ), and the silver ion (Ag + )] will be tested. The purpose of these tests is to determine what physical and chemical properties can be attributed to each substance(Website 1). Physical properties can be observed without changing the identity of the compound, this includes traits such as water turning into ice then melting back into it's liquid state.
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This note was uploaded on 04/14/2010 for the course CHEM 13891 taught by Professor Hierl during the Spring '10 term at Kansas.

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Chem Lab #3 Report - Lab #3 Report: Scientific Observations...

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