Chem 3A-Burdge Worksheet - Chapter 17 - Redox Reactions Page 7 of 7 5. (6 pts) G

Question

Chem 3A-Burdge Worksheet - Chapter 17 - Redox Reactions Page 7 of 7 5. (6 pts) Given the balanced half-reactions in acidic conditions, write the balanced overall equation in basic conditions. 02(8) +4H(ag) +4e2H2O(a) Show Work Simplißed: Activity Series of Refer to the Activity Series of Metals for Questions 6-7 Metals 6. Determine whether or not each redox reaction occurs sponta neously in the forward direction. (a) (2 pts) Fe(s) + Cu2+(aq) Fe2+(aq) + Cu(s) A. Spontaneous B. Not Spontaneous (b) (2 pts) Sn(s) + 2 Na+(aq)--Sn2+(aq) +2Na(s) A. Spontaneous B. Not Spontaneous Mn(s)Mn (aq) +2e +3e (e) (2 pts) Pb(s) +Mn (sg) Pb (a)+Mn() +2e ) +2e H2(g) 2H. (aq) + 2e B. Not Spontaneous (d) (2 pts) 2 Al(s) +6H+(aq)2AP+(aq) +3H2(g) A. Spontaneous B. Not Spontaneous +1e 7. (5 pts) Which of these metals would not react with HCI? Justify your reasoning based on the Activity Series. O Magnesium (Mg) O Silver (Ag) v20171030a

Explanation / Answer

balanced must add ALL of the sepcies

reactants:

Al2O(s) + 7H2O(l) + O2(g) + 4H+(aq) + 4e-

products

2[Al(OH)4]-(aq) + 6H+ + 4e- + 2H2O(aq)

simplify

Al2O(s) + 7H2O(l) + O2(g) + 4H+(aq) + 4e- = 2[Al(OH)4]-(aq) + 6H+ + 4e- + 2H2O(aq)

Al2O(s) + 7H2O(l) + O2(g) + = 2[Al(OH)4]-(aq) + 2H+(aq) + 2H2O(aq)

this is now simplified

Al2O(s) + 7H2O(l) + O2(g) + = 2[Al(OH)4]-(aq) + 2H+(aq) + 2H2O(aq)

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