a) Complete and balance the following half-reaction: Mo3+(aq)Mo(s) (acidic solut
ID: 974639 • Letter: A
Question
a) Complete and balance the following half-reaction: Mo3+(aq)Mo(s) (acidic solution) Express your answer as a chemical equation. Identify all of the phases in your answer. Indicate whether the half-reaction above is an oxidation or a reduction.
b) Complete and balance the following half-reaction: H2SO3(aq)SO24(aq) (acidic solution) Express your answer as a chemical equation. Identify all of the phases in your answer. Identify all of the phases in your answer. Indicate whether the half-reaction above is an oxidation or a reduction.
c) Complete and balance the following half-reaction: NO3(aq)NO(g)(acidic solution) Express your answer as a chemical equation. Identify all of the phases in your answer. Indicate whether the half-reaction above is an oxidation or a reduction.
d) Complete and balance the following half-reaction: O2(g)H2O(l)(acidic solution) Express your answer as a chemical equation. Identify all of the phases in your answer. Indicate whether the half-reaction above is an oxidation or a reduction.
e) Complete and balance the following half-reaction: O2(g)H2O(l) (basic solution) Express your answer as a chemical equation. Identify all of the phases in your answer. Indicate whether the half-reaction above is an oxidation or a reduction.
f) Complete and balance the following half-reaction: Mn2+(aq)MnO2(s) (basic solution) Express your answer as a chemical equation. Identify all of the phases in your answer. Indicate whether the half-reaction above is an oxidation or a reduction.
g) Complete and balance the following half-reaction: Cr(OH)3(s)CrO24(aq) (basic solution) Express your answer as a chemical equation. Identify all of the phases in your answer. Indicate whether the half-reaction above is an oxidation or a reduction.
Explanation / Answer
a) Mo3+(aq) + 3e- ---> Mo (s) reduction
b) H2SO3(aq) + H2O (l) ----> SO42-(aq) + 4H+(aq) +2e- oxidation
c) NO3-(aq) + 3e- + 4H+ ----> NO(g) + 2H2O (l) reduction
d) O2(g) + 4H+(aq) + 4e- ----> 2H2O (l) reduction
e) O2(g) + 4H2O(l) + 4e- ----> 2H2O (l) +4 OH-(l) reduction
f) Mn2+(aq) + 4OH-(aq) -----> MnO2(s) +2H2O (l) + 2e- oxidation
g) Cr(OH)3(s) + 5OH- -----> CrO42-(aq) + 4H2O (l) + 3e- oxidation
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