Chemistry the unit is electro chemistry- grade 12:) How many H2O's must be added to the half reaction given below to balance the mass for oxygen? MnO4^- (aq) => MnO2 (s) O2 on the right side 2 on the left side

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the unit is electro chemistry- grade 12:) 
Chemistry
the unit is electro chemistry- grade 12:)
How many H2O's must be added to the half reaction given below to
balance the mass for oxygen? MnO4^- (aq) => MnO2 (s)
2 on the right side
2 on the left side
1 on the left side
1 on the right side
What must be added to the following half-reaction for it to be balanced?
2H20(I) => H2O2(aq) + 2H^+ (aq) + 2e-
2 electrons to the left side
it is already balanced
2 electrons to the right side
1 electron to the right side
If the metal used at the cathode is Ag^+, what is its half reaction?
Ag^2+ (aq) + 2e- => Ag(s)
Ag^1+ (aq) => Ag(s)
Ag^1 (aq) => Ag(s) + 1e-
Ag^1+(aq) + 1e- => Ag(s)
Which statement about a galvanic cell is NOT correct? *
Reduction occurs at the cathode.
Oxidation occurs at the anode.
Chemical species can have their oxidation number decreased at the cathode.
Elemental metal is routinely converted to metal cations at the cathode
00
Which statement about a galvanic cell is NOT correct? *
Reduction occurs at the cathode.
Oxidation occurs at the anode.
Chemical species can have their oxidation number decreased at the cathode.
Elemental metal is routinely converted to metal cations at the cathode
1 po
Oxidation processes always result in a decrease in the oxidation number
of a species. Re-write this statement so it is correct.
Your answer
Transcribed Image Text:Chemistry the unit is electro chemistry- grade 12:) How many H2O's must be added to the half reaction given below to balance the mass for oxygen? MnO4^- (aq) => MnO2 (s) 2 on the right side 2 on the left side 1 on the left side 1 on the right side What must be added to the following half-reaction for it to be balanced? 2H20(I) => H2O2(aq) + 2H^+ (aq) + 2e- 2 electrons to the left side it is already balanced 2 electrons to the right side 1 electron to the right side If the metal used at the cathode is Ag^+, what is its half reaction? Ag^2+ (aq) + 2e- => Ag(s) Ag^1+ (aq) => Ag(s) Ag^1 (aq) => Ag(s) + 1e- Ag^1+(aq) + 1e- => Ag(s) Which statement about a galvanic cell is NOT correct? * Reduction occurs at the cathode. Oxidation occurs at the anode. Chemical species can have their oxidation number decreased at the cathode. Elemental metal is routinely converted to metal cations at the cathode 00 Which statement about a galvanic cell is NOT correct? * Reduction occurs at the cathode. Oxidation occurs at the anode. Chemical species can have their oxidation number decreased at the cathode. Elemental metal is routinely converted to metal cations at the cathode 1 po Oxidation processes always result in a decrease in the oxidation number of a species. Re-write this statement so it is correct. Your answer
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