Answer to Question #176764 in General Chemistry for Pakya

Question

When a NiMH battery is in use ("discharging"), the redox reaction is

a. Ni + 2 MnO2 + H2O --> Ni(OH)2 + Mn2O3

b. 2NiO(OH) + Cd --> Cd(OH)2 + 2 Ni(OH)2

c. Zn + 2 MnO2 --> ZnO + Mn2O3

d. NiO(OH) + MH --> M + Ni(OH)2

e. NiO + 2 MH --> Ni + M + H2O

A voltaic cell is made of a Ga strip dipped into 1.00 M Ga(NO) and the SHE plus the other necessary cell components. After the cell has operated for several minutes, 0.450 L of H(g) at STP are generated. How many grams of Ga have been oxidized in this process? Assume there is 1.00 L of solution.

A primary cell is a voltaic cell that ____.

a. Can be recharged but not discharged

b. Can be discharged and recharged

c. Cannot be discharged or recharged

d. Can be discharged but not recharged

Answer 1

a) a. Ni + 2 MnO2 + H2O --> Ni(OH)2 + Mn2O3

b) 0.0847g/L

c)d. Can be discharged but not recharged