(show all your works and make sure that you answer all questions from part a to
ID: 1012993 • Letter: #
Question
(show all your works and make sure that you answer all questions from part a to part b)
a. how is the SHE(standard hydrogen electrode)used to determine unknown half-cell voltages
b. use the attaced picture below, illustrates the "SHE(standard hydrogen electrode)" in use(right side). what are the two critical components of this device that must be utilized whenever gases are involved in electrochemical cells
Anode Cathoda Zn 2e lost per 2n atom Zn2+ Pt wire Pt 1 M Zn24 Oxidation half-reaction Zn(s) Zn2+(aq) + 2e- Reduction half-reaction 2H30' (aq) + 2e- H2(g) + 2H2O) Overall (cell) reaction Zn(s) + 2H30' (aq) -. Zn2+ (aq) + H2(g) + 2H2O) 21.7 Determining an unknown Esical with the standard ref ydrogeni electrode. The magnified view of the hydrogen half reaction (right) shows two H,0 ions being reduced to twoH and an H, molecule, which enters the H, bubbleExplanation / Answer
a) SHE potential is Zero. it is reference electrode so,it is used to determine unknown electrode potential . by connecting SHE with unkown electrode with salt bridge and placing the voltmeter or potentiometer in external circuit.the reading in voltmeter indicates potential of unknown electrode.
b) one important component is salt bridge and another one is maintaining pressure of hydrogen at 1 atm pressure in SHE.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.