CHM 1046 Lecture 3 homework

7.6. Write the Nernst equation and define all terms.7.7. What is the potential of cell made up of Zn/Zn 2+ and Cu/Cu 2+ half‐cells at 25 o C if [Zn 2+ ] = 0.25 M and[Cu 2+ ] = 0.15M?7.8. Calculate Eo, E and DG for the following cells:a. Mg (s) + Sn 2+ Mg 2+ + Sn (s), [Mg 2+ ] = 0.045 M, [Sn 2+ ] = 0.035 Mb. 3Zn (s) + 2Cr 3+ 3Zn 2+ + 2Cr (s), [Zn 2+ ] = 0.0085 M, [Cr 3+ ] = 0.010 M7.9. What is the difference between a galvanic cell and an electrolytic cell?7.10. Calculate emf for : Mg(s)|Mg 2+ (0.024M)||Mg 2+ (0.053M)|Mg (s)7.11. The passage of current of 0.750 A for 25.0 min deposited 0.369 g of Copper from a CuSO 4 solution.Calculate the molar mass of copper from JUST this information.7.12. The SO 2 percent in air is mainly responsible for the phenomenon of acid rain. The concentrationof SO2 can be determined if by titrating against a standard permanganate solution as follows:5SO 2 + 2MnO 4 ‐ + 2 H 2 O 5SO 4 2‐ + 2Mn 2+ + 4H +Calculate the number of grams of sulfur dioxide in a sample of air if 7.37 mL of 0.00800 M KMnO 4 arerequired for the titration.7.13. Oxalic acid (HC 2 O 4 ) is present in many plants and vegetables. A) balance the following equation inacid solution,MnO 4 ‐ + C 2 O 4 2‐ Mn 2+ + CO 2b) if a 1.00 g sample of oxalic acid requires 24.0 mL of 0.0010M KMnO 4 to reach the equivalence pointwhat is the percent by mass of oxalic acid in the sample?7.14. Calcium oxalate (CaC 2 O 4 ) is insoluble in water. This property has been used to determine theamount of ionic calcium in blood. Tha calcium oxalate is dissolved in acid and titrated against standardKMnO 4 as in problem 7.13. In one test, the amount of calcium from 10.0 mL of blood required 24.2 mLof 9.56x10‐4 M KMnO 4 . Calculate the number of milligrams of calcium per milliliter of blood.7.15. A spoon was silver plated electrolytically in AgNO 3 solution. A) Sketch a diagram of this occurring.B) If 0.884 g of silver was deposited on the spoon at a constant current of 18.5 mA, how long did theelectrolysis take?