1. Predict the products at anode and cathode and write half-cell reactions of the following electrolysis reactions: i) CaS (l) ii) Aqueous KBr
1. Predict the products at anode and cathode and write half-cell reactions of the following
electrolysis reactions:
i) CaS (l)
ii) Aqueous KBr
2. Mg(s) + Cd2+(aq) → Mg2+(aq) + Cd(s) Eo = +1.98 V
The magnesium electrode was dipped into a 1.00 M solution of MgSO4 and the cadmium
the electrode was dipped into a solution of unknown Cd2+ concentration. The potential of the
the cell was measured to be +1.54 V. What was the unknown Cd2+ concentration?
3. Two identical pieces of the same unknown metal are placed into 1.0 M solutions of
aqueous LiNO3 and aqueous Fe(NO3)2. No reaction is observed in the aqueous LiNO3.
However, the metal appears to dissolve in the aqueous Fe(NO3)2. If the possible metals
are nickel and zinc, which metal would be expected to react? Calculate the cell potential
under standard conditions for the metal that did react.
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