Question

Equation: Fe+CuCl2>FeCl2+Cu

The ratio of moles of copper produced to moles of iron reacted should be 1:1,but I get 60:17 in lab,can you tell me What might have caused them to be differ from what we expect them to be?

Answer 1

With the limited information that you provide only I can speculate several possible factors considering you performed the experiment and calculations correctly.
1) the reactants are not 100% pure
2) the reaction is not at completion
3) you didn't add enough CuCl2
4) your measurements are not correct
5) the conditions (temperature, concentrations, etc) of the reaction are not the optimal conditions.
To be more specific I will need to know more details about how did you performed the experiment and how did you do the calculations to get the relationship 60:17. How accurate were your measurements