1. An electrochemical cell is based on the following two half-reactions: Ox: Pb(s)â†’Pb2+(aq, 0.18 M )+2eâˆ’ Red: MnOâˆ’4(aq,...

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Chemistry

1. An electrochemical cell is based on the following twohalf-reactions:
Ox: Pb(s)â†’Pb2+(aq, 0.18 M )+2eâˆ’
Red: MnOâˆ’4(aq, 1.50 M )+4H+(aq,1.8 M )+3eâˆ’â†’
MnO2(s)+2H2O(l) Compute the cell potential at 25âˆ˜C.
2.A concentration cell consists of two Sn/Sn2+ half-cells. Thecell has a potential of 0.16 V at 25 âˆ˜C.
What is the ratio of the Sn2+ concentrations in the twohalf-cells?
Express your answer using two significant figures.

3.Metal plating is done by passing current through a metalsolution. For example, an item can become gold plated by attachingthe item to a power source and submerging it into a Au3+ solution.The item itself serves as the cathode, at which the Au3+ions arereduced to Au(s). A piece of solid goldis used as the anode and is also connected to the power source,thus completing the circuit.
What mass of gold is produced when 8.80 A of current are passedthrough a gold solution for 18.0 min ?
Express your answer with the appropriate units.

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3.8 Ratings (498 Votes)

1 Ox PbsPb2aq 018 M 2e E0anode 0126 Red MnO4aq 150 M 4Haq 18 M 3e MnO2s2H2Ol E0cathode 059 E0cell E0cathode E0anode 059 0126 0716 Volt Ecell E0cell 00592 n log Q The balanced equation will be 3Pb 2MnO4 See Answer

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