Co0 → Co+2 + 2 e N0 + 3 e → N-3 Br0 + 1 e → Br-1 Ni0 → Ni+3 + 3 e Ag0 → Ag+1 + 1 e Sr0 → Sr+2 + 2 e Se0 + 2 e → Se-2 Sb0 + 3 e → Sb-3 Fe0 → Fe+2 + 2 e W0 → W+6 + 6 e Label each reaction as Oxidation or Reduction Do metals or nonmetals tend to gain e and be reduced? Nonmetals Do metals or nonmetals tend to lose e and be oxidized? Metals
Co0 → Co+2 + 2 e N0 + 3 e → N-3 Br0 + 1 e → Br-1 Ni0 → Ni+3 + 3 e Ag0 → Ag+1 + 1 e Sr0 → Sr+2 + 2 e Se0 + 2 e → Se-2 Sb0 + 3 e → Sb-3 Fe0 → Fe+2 + 2 e W0 → W+6 + 6 e Label the element in the reactions as an oxidizing agent or a reducing agent: Do metals tend to be oxidizers or reducing agents? Metals Do non-metals tend to be oxidizers or reducing agents? Nonmetals
Extra one for practice Done in class
Galvanic / Voltaic A galvanic cell is one in which a redox reaction takes place spontaneously to produce electricity. Chemical energy is changed to electrical energy.
Electrolytic Cell An electrolytic cell is one in which electrolysis occurs, a compound is decomposed by passing electricity through it. The reaction occurring is not spontaneous, it is forced by applying a voltage (electricity). Electrical energy is converted to chemical energy