Weight of Copper: 1.089g Volume of Added Nitric Acid: 5.7 mL Total weight of added Sodium Carbonate: 3.938 g Weight of watch glass and filer paper: 52g Weight of watch glass, filte rpaper, and precipitate: 53.945g Experimental yield of CuCl: 1.945g Theoretical yield of CuCl: 1.697 g Percent yeild: 114.614 % 1) Why ight a student obtain a percent yield more than 100% for this preparation?
Weight of Copper: 1.089g
Volume of Added Nitric Acid: 5.7 mL
Total weight of added Sodium Carbonate: 3.938 g
Weight of watch glass and filer paper: 52g
Weight of watch glass, filte rpaper, and precipitate: 53.945g
Experimental yield of CuCl: 1.945g
Theoretical yield of CuCl: 1.697 g
Percent yeild: 114.614 %
1) Why ight a student obtain a percent yield more than 100% for this preparation?
Chemical reactions in the real world can differ from how they seem on paper. During an experiment, a variety of factors may cause the creation of less product than expected. There are typically losses due to an incomplete reaction, unwanted side reactions, etc., in addition to spills and other experimental failures. For a reaction to be successful, chemists require a measurement. The percent yield is the name of this measurement.
To calculate the percent yield, it is first essential to ascertain, using stoichiometry, how much of the product should be produced. The maximum amount of product that may be produced from the specified reactant amounts is known as the theoretical yield. The amount of product that actually forms during the reaction in a lab setting is known as the actual yield. The actual yield to theoretical yield ratio, stated as a percentage, is known as the percent yield.
Percent yield: (Actual yield/theoretical yield) * 100
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