In an experiment using nickel and copper, and using the standard reaction potential table, which substance would be reduced, Cu or Ni.© BrainMass Inc. brainmass.com October 24, 2018, 6:52 pm ad1c9bdddf
The chemical way to look at redox reactions is that the reductant transfers electrons to the oxidant. Thus, at the end of ...
The solution provides a detailed explanation for the problem. The standard reaction potential tables are used. The substance which would be used to reduce Cu or Ni are determined.
Calculate the standard emf for each of the following reactions
1. Calculate the standard emf for each of the following reactions:
a)H2(g) + F2(g)---> 2H+(aq) + 2F-(aq)
b)Cu(s) + Ba 2+(aq)---> Cu 2+(aq) + Ba(s)
c)3Fe 2+(aq)---> Fe(s) + 2Fe 3+(aq)
d)Hg2 2+(aq) + 2Cu+(aq)----> 2Hg(l) + 2Cu 2+(aq)
2. The standard reduction potential for the reduction of RuO4-(aq) to RuO4 2-(aq) is +0.59 V. Which of the following substances can oxidize RuO4 2-(aq) to RuO4-(aq) under standard conditions: Cr2O7 2-(aq), ClO-(aq), Pb 2+(aq), I2(s), Ni 2+(aq)?
3. Using standard reduction potentials, calculate the equilibrium constant for each of the following reactions at 298 K:
a) 2 VO2+(aq) + 4 H+(aq) + 2 Ag(s)-----> 2 VO 2+(aq) + 2 H2O(l), 2 Ag+(aq)
b) 3 Ce 4+(aq) + Bi(s) + H2O(l) -----> 3 Ce 3+(aq) + BiO+(aq) + 2 H+(aq)
c) N2H5+(aq) + 4 Fe(CN)6 3-(aq)-----> N2(g) + 5 H+(aq) + 4 Fe(CN)6 4-(aq)
4. A voltaic cell is constructed that is based on the following reaction:
Sn 2+(aq) + Pb(s)----> Sn(s) + Pb 2+(aq)
a) If the concentration of Sn 2+ in the cathode compartment is 1.00 M and the cell generates an emf of +0.22 V, what is the concentration of Pb 2+ in the anode compartment?
b) If the anode compartment contains [SO4 2-]= 1.00 M in equilibrium with PbSO4(s), what is the Ksp of PbSO4?
5. a) Draw two linkage isomers of [Co(NH3)5 SCN]2+
b) Draw the two geometric isomers of [Co(NH3)3 Cl3]2+
c) Two compounds with the formula Co(NH3)5ClBr can be prepared. Use structural formulas to show how they differ. What kind of isomerism does this illustrate?