Assign oxidation numbers to all the atoms or ions in each of the following reactions. Then identify the reactant oxidized and the reactant reduced. a. 4 Al w) + 3 Oz () → 2 Al,O3) (8) b. Mg «) + 2 Agʻ (m) 2 Ag » + Mg² (m) (8) (8) c. 2 Al (0) + 6 H' (aq) - 2 AP" (ag) + 3 H2 (a)
Assign oxidation numbers to all the atoms or ions in each of the following reactions. Then identify the reactant oxidized and the reactant reduced. a. 4 Al w) + 3 Oz () → 2 Al,O3) (8) b. Mg «) + 2 Agʻ (m) 2 Ag » + Mg² (m) (8) (8) c. 2 Al (0) + 6 H' (aq) - 2 AP" (ag) + 3 H2 (a)
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text:101. Assign oxidation numbers to all the atoms or ions in each of the following reactions.
Then identify the reactant oxidized and the reactant reduced.
a. 4 Al + 3 Oz (a)
2 Al,O, )
(8)
b. Mg (w) + 2 Ag' (wq)
2 Ag » + Mg² (»)
c. 2 Al (s)
+ 6 H' (aq)
- 2 Al*
+ 3 Hz
(aq)
(g)
d. Cl2 (a) + 2 Nal (ag) →
I2 (ma) + 2 NaCi
(aq)
e. MnO, (a) + 4 HCI (ng)
Cl2 + MnCl, cag + 2 H,O
(aq)
f. 2 Fe w) + O2 » + 2 H20 m → 2 Fe(OH): («)
(s)
(g)
102. Draw a detailed diagram of a galvanic cell that involves iron (III) metal and copper (II)
metal using sulphate as your anion for each solution and potassium chloride solution
for your salt bridge.
a. Indicate the direction of motion of the electrons and all ions.
b. Label the anode and the cathode.
c. Write the oxidation and reduction half reactions.
d. Write the overall (net) galvanic cell reaction
e. How many electrons are exchanged for each redox process?
f. Where does oxidation take place?
g. Where does reduction take place?
h. What is the purpose of the salt bridge?
i. Which electrode gets bigger and which gets smaller? Why?
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