Cuprum

Determine the limiting reactant?

4. In an experiment, 1.79 g of cuprum, Cu is reacted with 6.05 g of silver(I) nitrate,
AgNO3. Determine the limiting reactant.
[JAR ; Cu = 64, Ag = 108, N = 14, O = 16]
Cu + 2AgNO3=Cu(NO3)2 + 2Ag

5. Calculate the percent yield for the experiment above in question 4, if 2.73 g cuprum(II)
nitrate is obtained.

moles copper = 1.79 / 64 =0.0280
moles AgNO3 required = 2 x 0.0280=0.0560
moles AgNO3 = 6.05 g/ 170 g/mol= 0.0356 => limiting reactant
moles Cu(NO3)2 = 0.0356/2=0.0178
mass Cu(NO3)2 = 0.0178 x 188 g/mol= 3.35 g
% = 2.73 x 100 / 3.35 = 81.6

Cuprum update

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