Before class on Sept. 9, watch the 2 videos below ( 11 min and 14 min), and complete the notesheet notes-lesson-4-theoretical-yield-actual-yield-and-percent-yield. Please leave a comment on the video.
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chemistry matters
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chemistry matters 
In this video I learned about the difference between theoretical yield, actual yield and percent yield, and how to calculate each with the help of BCA tables. Actual yield can never be more than theoretical yield. I also learned how to solve complex problems with the aid of pictures. Through this video, we applied knowledge of percent composition, limiting reactants, BCA tables and theoretical yield to solve for the percent composition of iron in impure iron ore given a balanced equation, grams of iron ore before the reaction, and grams of pure iron after the reaction.
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I learned how to use BCA tables in order to find mass percent. I also learned that actual yields and theoretical yields are always in grams. To find the answer, moles must be converted back to grams.
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In this video we learned about the differences between theoretical yield, actulal yeild, and pecent yield. We also learned how to find a percent yield from a given word problem by using a BCA table. Moles are used in the BCA table, then changed to grams and later to percentages.
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In lesson 4.1, I learned about Theoretical Yield (amount of substance produced if the limiting reactant is used up), Actual Yield ( the amount you actually make, which cannot be greater than theoretical yield),and Percent Yield (actual Yield/Theoretical Yield x 100).
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Yields are how much you get in grams. There’s the actual yield and theoretical yield which are both used to solve the percentage yield. I also got more in depth with the bca table and went backwards to find the mass.
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We learned about 3 different types of yield which are Theoratical yield, Actual yield and, percent yield. Also how to find mass percent using BCA tables.
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The theoretical yield is how much of a substance you would make if all of the limiting reactants is used up.
The actual yield is how much one actually made in an experiment.
To find the percent yield, take the actual yield and divide it by the theoretical yield and multiply by 100.
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In these videos I learned about theoretical yields, actual yields, and mass percent. I learned how to use a BCA table to enable me to find the mass percent of what I’m looking for. I also learned that impure Fe2O3 is not just Fe2O3, but also impurities, which means further investigation and careful analysis of problems are necessary before actually solving the problem.
Question: What effect do catalysts have in problems involving mass percent? We recently learned about catalysts in AP Biology, so I’m curious to know whether we will be learning about catalysts and how they affect the mass of products/reactants (if they do at all).
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This isn’t my official comment but id like to thank Amber and Kelly for such a detailed comment, after watching the videos their comments helped me further understand what i had just watched. Part two to this unofficial comment is where are the horses you speak of Mrs Irwin?
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I learned that when working with percent yield not all the variables are necessary at the beginning to answer the question. This is because I can use what I know and then reverse the steps to find the unknown variable. Does anyone know any more examples of why the actual yield isn’t the same as the theoretical yield?
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In this lesson I learned about yields. Yields are calculated in grams and the actual yield can never be more than the theoretical yield. The actual yield is usually less than the theoretical yield. I also learned how to apply yields to a complex problem.
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This video defines theoretical yield, actual yield and the percent yield. Theoretical yield is how much of a substance you make if all the limiting reactant is used up. Actual yield is the amount you actually make, and percent yield can be determined by using actual yield/ theoretical yield x 100.
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