To determine if 2,200 g of recrystallized dibenzalacetone is a good yield, you need to consider a few factors:
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Theoretical Yield: First, it's important to know what the theoretical yield of dibenzalacetone is based on the starting materials used in the synthesis. If you calculated the theoretical yield from balanced chemical equations and based on the amounts of reactants, you can then compare the actual yield (2,200 g) to the theoretical yield.
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Percent Yield: Yields are often expressed as a percentage. To find the percent yield, you can use the formula: \[ \text{Percent Yield} = \left( \frac{\text{Actual Yield}}{\text{Theoretical Yield}} \right) \times 100% \] If the percent yield is high (typically, yields above 70-80% are considered good in organic synthesis), then you can consider the yield to be good.
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Purity and Quality: The purity of the recrystallized dibenzalacetone can also affect the perceived quality of the yield. If the product is of high purity, then it reflects a successful synthesis and isolation process.
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Context: Compare this yield to typical yields reported in literature for dibenzalacetone synthesis. Some reactions may yield lower amounts due to inefficiencies or losses during purification steps.
In summary, to evaluate if 2,200 g of dibenzalacetone is a good yield, you should calculate the theoretical yield based on your starting materials and find the percent yield. A high percent yield along with high purity would indicate that it is a good yield.