WorksheetsQuiz2
Total questions: 9
Worksheet time: 11mins
Concentration of 1 mmol/L corresponds to
1 mol/m3
1 mol/cm3
10-6 mol/m3
1000 mol/cm3
The standard potential is the potential measured relative to the hydrogen electrode at
273 К, p(H2)=1 аtm, а(H+)=1
298 К, p(H2)=1 аtm, а(H+)=1
298 К, p(H2)=1 аtm, c(H+)=1
How does the equilibrium potential of a Cu electrode change when the activity of Cu²⁺ ions decreases?
Decreases
(59 mV per decade)
Decreases
(29.5 mV per decade)
Increases
(59 mV per decade)
Increases
(29.5 mV per decade)
The equilibrium potential of a Cu electrode in an infinitely dilute Cu²⁺ salt solution will
tend to + ∞
tend to - ∞
= 59 mV
= Eo(Cu2+/Cu)
determined by impurities
The equilibrium potential of the Cu²⁺/Cu electrode as a function of pH has a slope of
59 mV
-28.5 mV
28.5 mV
0 mV
The potential of a reversible hydrogen electrode (RHE) measured in a solution at pH = 5 relative to the standard hydrogen electrode (SHE) will be approximately
+0,295 V
-0,295 V
+0,147 V
-0,147 V
The equilibrium potential of the Co₂O₃/HCoO₂⁻ electrode as a function of pH has a slope of
59 mV
-59 mV
0 mV
-118 mV
Find the EMF of the following circuit (concentration cell):
Cu ∣ 0, 001 M CuSO4 ∥ 0, 1 M CuSO4 ∣ Cu
Assume the activity coefficients are equal to 1.
0.059 V
0.0295 V
-0.0295 V
0 V
-0.059 V
The equilibrium potential of the Cu²⁺/Cu couple relative to the SHE is 0.340 V. Estimate its potential relative to an Ag/AgCl (sat. KCl) reference electrode. The potential of this reference electrode vs SHE is 0.197 V.
0, 143 В
0,537 В
0.340 В
-0,197 В
