AP Chem Units 3-4
Group 1A oxidation number
+1
Hydrogen
+1
Group 2A oxidation number
+2
Flourine oxidation number
-1
Group 7A oxidation number
-1
Oxidation Rules Order
1. Group 1A 2. Group 2A 3. Fluorine 4. Hydrogen 5. Oxygen 6. Group 7A 7. Group 6A
Al(s)→Al3+(aq)+3e− Zn2+(aq)+2e−→Zn(s) The half-reactions for the oxidation-reduction reaction between Al(s) and Zn2+(aq) are represented above. Based on the half-reactions, what is the coefficient for Al(s) if the equation for the oxidation-reduction reaction is balanced with the smallest whole-number coefficients?
2
monatomic ion oxidation number
= charge
When 0.20 M NH4Cl(aq) and 0.20 M NaOH(aq) are mixed, the reaction represented by the equation above occurs and a strong smell of ammonia, NH3, is observed. Based on this information, which of the following statements is true?
NH4+(aq)NH4+(aq) is a stronger acid than H2O(l)H2O(l) is.
Group 6A oxidation number
-2
Oxygen oxidation number
-2 except peroxide -1)
Ni(s)→Ni2+(aq)+2e− Ag+(aq)+e−→Ag(s) Which of the following is the balanced net ionic equation for an oxidation-reduction reaction between Ag+(aq) and Ni(s)based on the half-reactions represented above?
2Ag+(aq)+Ni(s)→2Ag(s)+Ni2+(aq)2Ag+(aq)+Ni(s)→2Ag(s)+Ni2+(aq)
HCl(aq)+H2O(l)→H3O+(aq)+Cl−(aq) For the dissolution of HCl in water represented above, which of the following pairs includes the Brønsted-Lowry bases?
H2O(l)H2O(l) and Cl−(aq)
Cu(s)+2AgNO3(aq)→Cu(NO3)2(aq)+2Ag(s) The reaction between solid copper and aqueous silver nitrate produces solid silver and a blue solution, as represented by the balanced equation shown above. Based on the balanced equation, which of the following identifies the oxidation and reduction half-reactions?
Oxidation Half-reactionReduction Half-reactionCu(s)→Cu2+(aq)+2e−Cu(s)→Cu2+(aq)+2e−Ag+(aq)+e−→Ag(s)Ag+(aq)+e−→Ag(s)
When C2H4(g) reacts with H2(g), the compound C2H6(g) is produced, as represented by the equation above. The reaction is correctly classified as which of the following types?
Oxidation-reduction, because H2(g)H2(g) is oxidized
I2(aq)+C6H8O6(aq)→C6H6O6(aq)+2I−(aq)+2H+(aq) The compound C6H8O6 reacts with I2 according to the reaction represented by the equation above. The reaction is correctly classified as which of the following types?
Oxidation-reduction, because I2I2 is reduced.
Atoms in their elemental state oxidation #
0