Percentage yield of Cu Lab - expectations

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1) Lab - Find the % yield of Cu produced by a
reaction of 2g of CuCl2 with an excess of Al
metal.
a) Read pp. 241-242. (text)
b) Draw a labeled diagram of the materials used
to isolate the product produced. (5)
c) Observations? Organize data needed to
complete lab. (3)
d) Conclusion and Analysis
i)
Calculate the number of moles of CuCl2
used. ( the salt is a dihydrate) . (5)
ii)
Write out the balanced equation. (2)
iii) Find the number of moles of Al used.
(5)
iv) Predict the number of moles of Al
needed from the moles of CuCl2
used.(2)
v)
Determine the excess of Al used.
(mass) (5)
vi) Find the theoretical yield of Cu (7)
vii) Find the % yield of Cu. (5)
viii) Discuss reasons why the % yield may
not be 100% in this lab. (3 factors- be
specific and state the effects on yield
for each factor) (6)
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