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The post-lab questions provided are SIMILAR to questions you may encounter in your lab manual. These questions will provide you with a step-by-step guide on how we approached the problem. You can use this guide and the data you recorded to help answer the questions. Any given examples with values will be with mock values. Use of these values will almost assuredly give you nonsensical calculations. They are only meant to illustrate the logic.

question 1

You are asked to compare your initial copper with the amount yielded after the reactions.

Percent yield is calculated by dividing your actual yield (mass of copper after reaction 5 and drying) with the expected or theoretical yield (mass you initially used) multiplied by 100.

Percent Yield = (Actual Yield ÷ Theoretical Yield) x 100

A percent yield that is less than 100 means that you made less than what you were supposed to get. This could be a number of reasons such as loss of substance during transfer.

A percent yield that is more than 100 means that you have more than what you were supposed to get. This could be a number of reasons such as impurities or that the sample was not completely dry.