WorksheetsElectrode Potentials
Total questions: 10
Worksheet time: 20mins
-0.41V
-0.27 V
+0.27 V
+0.41 V
The salt bridge is best prepared by soaking filter paper in
1 mol dm-3 solution of potassium bromide
1 mol dm-3 solution of potassium chloride
saturated solution of potassium nitrate
saturated solution of potassium iodide
The relevant standard electrode potentials for this cell are shown below.
Cr3+(aq) + 3e- ⇌ Cr(s) E= − 0.74 V
Ag+(aq) + e− ⇌ Ag(s) E = + 0.80 V
Calculate the emf of the cell shown in the diagram.
+1.54 V
-1.54 V
+ 0.06 V
- 0.06 V
The mass of 1 mol of chromium(III) sulfate (Cr2(SO4)3) is 392 g. Hence, for the cell in the diagram to measure the standard electrode potential, 1 dm3 of the chromium(III) sulfate solution used must contain
104g of chromium(III) sulfate
196g of chromium(III) sulfate
392g of chromium(III) sulfate
784g of chromium(III) sulfate
Which species will oxidise Fe2+(aq) to Fe3+(aq)?
Br2 (aq)
Cl-(aq)
I2 (aq)
Mn2+(aq)
Calculate the emf for the reaction between MnO4– ions and Br– ions in acidic solution.
-0.42 V
+0.42 V
+2.60 V
-2.60 V
The electrode system based on the half-equation below has the standard electrode potential +1.51 V.
MnO4−(aq) + 8H+(aq) + 5e− ⇌ Mn2+(aq) + 4H2O(l)
Which of the following statements about this electrode system is correct?
Changing the concentration of Mn2+(aq) would cause a change in the electrode potential.
Mn2+(aq) is acting as an oxidizing agent.
The electrode used is made of manganese.
When connected to a standard hydrogen electrode, the resulting cell voltage would be +0.51 V.
The standard electrode potentials of two half reactions are shown.
Which of the following processes is thermodynamically favourable? The reaction of
Co2+ with Cl2 to form Cl−
Co2+ with Cl− to form Cl2
Co3+ with Cl2 to form Cl−
Co3+ with Cl− to form Cl2
At 298 K, the emf of this cell was +0.40 V.
The electrode potential of the copper metal / copper(II) ion electrode is +0.34 V.
What is the electrode potential of this silver metal / silver(I) ion electrode?
-0.74 V
-0.06 V
+ 0.74 V
+ 0.06 V
Which of the statements about a standard hydrogen electrode, for which E = 0 V, is correct?
A suitable solution for use in the electrode is hydrochloric acid with a concentration of 0.1 mol dm−3.
The pressure of the hydrogen has no effect on the value of E
The metal used in the electrode is platinum.
The temperature is 273 K.
