Question

Hi! i only need help with #4. for part ii) the equation we are suppsed to use is: I=1/2E(sum)CiZi^2.

for part iii. the equation we are suppose to use: logYi=-0509zi^2I^1/2.

for part iv) the equations we are suppsed to use are: 1. Ecell ~ Ecell ^o -(RT/nF) lnQ. 2. Q=(Yc[C])^c(YD[D])^d/(YA[A]^a(Yb[B])^b

Thank you!!:)

Pre-Lab Questions If I wish to construct a Voltaic Cell using Zinc-Zinc Ion and Silver-Silver Ion Half- Cells, which metal will serve as the Anode and which the Cathode? Justify your answer quantitatively. Data Ez.Zn2 vecho = -0.762 V Essingi wahe = +0.80 V 2. Write a Cell Reaction for the above Cell. Write appropriats. Half:Reactions. Identify the Oxidation and Reduction. 3. Draw a Cell Diagram for this Cell. 4. Determinc Eccº if 0.001 M ZnSO. and 0.001 M Ag2SO4 are used as clectrolytes. 1) First calculate Eccllº. ii) Then calculate the ionic strength I (Eq. 11) for the ZnSO. and Ag,SO. clectrolyte solutions. iii) Use the Debye-Huckel equation (Eq. 10) to determine the activity coefficients Yzma and YA. ivEinally determine Ecati using the Nernst Equation (Eas. 7 and 9).

Answer 1

1) I onic strength, IzĮ EG22 22 charge on on for en sout entam? ooolm, Sam 20-001 ? the charge of an 2+2, 20-22-2. 2) Int ro-ooom (+2)2 + o-colm (-2²) o-oomin. for Age soy & c z z [Arson) 2 2 Cocoolm) 0-002m 2Agt 2 +1 £ Co.oo2 (+1)2 + o-colm (-2) 2) I 2 0.003 m D Ecelur reduction Ent2/2n voltak celle potential , so Agt AGA (AG undergoes is greater reduction than of oxldatun undergoes Godell 2 Ered + toond 2 0-8 ov - (-0-7620) 2 1.5620 2 [1-560 DI 2 Tonic Shorth of Envoy 109/2nt? 2 – 0.509 2 JI - - 0.509x(+2) ? Jo.com 2 – 0.129 o Vzmaz - 10-0:129, 10-713)

log 70 Agt ? -0.509 * (0? Jo-oos zce 115 -0-0279 Pagt a 10-0.0279 | 210-318) » 0-3 Cell 2 to cell - RI an/ rentz Ernt?) ) nr overall equatrast zagt & zn - 2Ag + ant? ne number od electrons transfermed 22 of [angt)? at 250, T22981 02-303 RT 0-059137 Ecell ? 1.56 -0.059137 log (8.743 x O-colm L60-9378 0.00272) 21 1.49