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Explain why you did not obtain a 100 % yield. NOTE: “Human error” cannot be used...

Explain why you did not obtain a 100 % yield. NOTE: “Human error” cannot be used as an explanation, we are looking for systematic answers that would always apply.

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Answer #1

percentage yield is calculated from actual yield/theoretical yield x 100 percent. The difference between theoretical yield and practical yield is due to following reasons; 1; the reactants are not pure ,they contain some impurities thats why some side reactions take place and we did not get desired amount of product. 2; During purification method some of the product may lost by evaporation,distillation,filtration,some remain inside the vessel. 3; some reaction need energy to proceed.if the energy is removed before completion of reaction,then yield will be less than expected. 4;improper measurements also leads ti less yield.

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