Synthesis of \"Product A\": mass of copper Observations indicating that a chemic

Question

Synthesis of "Product A": mass of copper Observations indicating that a chemical reaction has occurred: Write a redox equation for the reaction that produced "A" using the half-reaction method. For full credit, show all of your work and be sure to include ion charges and phase labels In the space below, show the calculations that clearly the limiting reagent and label the limiting reagent.Note that you will need to use your balanced net ionic equation from above and the fact that you used 25.0 mL of 6.0 m HNO_3 (nitric acid) and about 1.00 g of copper.

Explanation / Answer

oxidation : Cu ----------------> Cu+2 + 2e-

reduction : NO3- + 2H+   + e- -----------------> NO2   + H2O

net reaction :

Cu + 2NO3- + 4H+ + --------->   2 NO2 + 2 H2O + Cu+2

A = NO2

moles of HNO3 = 25 x 6.0 / 1000 =0.15

moles of Cu = 1.00 / 63.55 = 0.0157

Cu +    4 HNO3 -----> Cu(NO3)2 + 2 NO2 + 2 H2O

1             4

0.0157    0.15

here limiting reagent is Cu

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