DD8156

21.01.2021 • 

Chemistry

The following two reactions are possible methods for refining copper in the final step of a smelting process, i.e., getting pure copper (Cu) from copper ores found in rocks. Calculate the theoretical atom economy for each reaction. a. 2 CuO (s) + C (s) → 2 Cu (s) + CO2 (g)

b. CuO (s) + CO (g) → Cu (s) + CO2 (g)

3. Use your calculations from the previous question (i.e., 2a and 2b) to answer the following questions.
a. Which one of the methods for refining copper ore is greener according to the atom economy principle of green chemistry?

b. Why is a calculation of atom economy helpful in comparing two chemical reactions to
determine which one is greener? In other words, what does atom economy tell you about “greenness”?

c. What is another possible consideration from the principles of green chemistry that could tell you more about comparing the “greenness” of these two reactions?

4. How are the two ways of measuring the efficiency (atom economy and percent yield) of a reaction the same? How do they differ?

Ответ:

Jasten

16.02.2023

Chemistry

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There is one simple way to determine between solids, liquids, and gases. Are you able to move the substance? And if you are, how does it move? If it takes on the shape of its new container, it is a liquid. For example, if you pour water from a cup into a bowl, it will fill the bowl, not stay in the same shape as it was in the cup. However, if you put a marble in a cup and then pour the marble into the bowl, it will remain the same shape, and is therefore a solid. If you move a gas into a container, and the container is not sealed, it will not remain in the same shape.

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