Unformatted text preview: Name: ID: A 96 Calculate E for the following electrochemical cell at 25 °C
«“5 {o3
9 q, 0.50 M) [ti-3m, 0.15 M) | Aw [email protected] I “k (
Pt(s) l Sn2 q, 0.50 M) n4+ v
given the following standard reduction potentials.
(fl @gKSHK—MfiQilaqfiE =-0.15 V ~0ttc, ,o 45 a -035
aq) +2’e‘ —) Sn2+(aq) E° =(+0.15 V)L~t\
‘X
.. o J‘ x
a. -0.35V 5" E - 0-0___._.19"' \n G / Meow"
b. -0.32 V f" i
’65:) -0.30V E‘- ‘O-‘B - 6.0161 \vx (OAFDQO-éoz
-0.25 V 'z _,
e. +0.05 V (05°) 0‘,
21. The following electrochemical cell has a potential of +0.617 V at 25 °C. u 7. fight ‘25’ ‘14
4,437.: Pt I H2<g,1-00 atm) I H+(aq, 1.00 M) H Ag*(aq) I Ag (”5* r f -’ A350) 0.1%“
,_ o_o|t85- Zpfit « 19’ am.) V“ The standard reduction potential, E”, of Ag+ = +0.799 V. What is the Ag+ concentration? l
"‘ “a. 8.3x10-8M "E“; . __\__
mu! L b. 7.1x10—6M « E '___._°-°LS" \nQ W X?» a 5‘" «a ‘C’
\ @ 8.4x10-4M - ¢ \
'4‘“‘°"“§€z d. 8.3x10-1M 6cm: 0.1M -_°_*_?E°_.1 in l\ 9'44““,(2 lawn)" -ic‘e. 1.2 x103M L ()0; w L _' X ‘ l 0 23 y = o .
What is the pH of the solution at the cathode if Ecell = -0.174 V for the following electrochemical cell at 25
\ °C?
03““ { Pt I H2(g, 1.0 atrn) | H+(aq, 1.00 M) n H+(aq) I H2(g, 1.0 atm) 1 Pt 3
91 2’ 1)" t " U“ .a. 2.94 b. 5.88 4. + 76/ _>; \A
c. 6.77 U" 1'
d. 8.12 c. 13.54 . Which factor will decrease the potential of the following electrochemical cell?
Pt I Sn4+(aq, 1.0 M), Sn2+(aq, 1.0 M) u Cu2+(aq, 0.200 M) I Cu switching from a platinum to a graphite anode
decreasing the size of the cathode increasing the concentration of Cu2+
decreasing the concentration of Sn4+
increasing the temperature of the cell 5%??? ...
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- Spring '07
- veige/martin
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