Experimental values, percent error?

Posted on 2014-11-18 07:03:00 in Chemistry by SIMON

1. How would your experimental value for moles Cu be affected in the following situations?
a. If 8.5-g CuSO4.5H2O were added instead of 7.0-g CuSO4.5H2O?
b. If the solid did not settle before decanting and some solid product was poured off during decanting?
c. if the solid product was not dried thoroughly and weighed wet?
2. Why was the mixture of CuSO4 stirred? Suggest changes that might result if the mixture is not agitated.
3. State two reasons why you may not recover the theoretical amount of copper in this experiment?
4. Calculate the mass of the aqueous product created.
5. How would your experimental results differ if you used less than the quantity of CuS04 calculated in Part I?
6. List three possible sources of error in this experiment and explain how it would affect the Fe:Cu or Zn:Cu ratio.
7. Would the reverse reaction occur? Explain your rational."

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