I got a) and b), Please help me on c) and d). Thank you s what effect would each

Question

I got a) and b),
Please help me on c) and d).
Thank you s what effect would each of the following situations have on the calculation of the number of moles of copper in this experiment? Would the moles of copper inc or decrease, or stay the same? Give a very brief explanation for each. a) You removed the aluminum wire while the mixture was still blue or contained bubbles. b) You added twice as much aluminum wire as necessary to the copper chloride. (Hint: Is aluminum a limiting reactant or in excess?) e aluminum wire. d The dehydration was not complete because your crystals were still green. You did not reheat to complete the dehydration.

Explanation / Answer

c)

If you can't scrape all of the copper from wire....

then you will have a smaller mass than that of the original

The formula of recovery goes as:

No mol of Copper = mass of Copper recovered / Molar Mass of Copper

since Molar MAss of copper is constant, then mass of COpper will be lower, since not all mass was recovered

Expect the number of moles be LOWER than that in reality

d)

If you do not get rid of ALL the water, i.e. those forming the crystals, then the total mass of Copper will be higher, since those are attached to water

then, from the formula

No mol of Copper = mass of Copper recovered / Molar Mass of Copper

expect mass of copper to be (incorrectly) higher than that in reality

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