MA 502215 Assignment 13 t x C ponses/submit?dep 4204284 Consider the titration o
ID: 1066455 • Letter: M
Question
MA 502215 Assignment 13 t x C ponses/submit?dep 4204284 Consider the titration of 23.0 ml of 0.osuo M S with 0.100 M He In 1 M HCI to give He2+ and Sn using pt nd calomel electrodes. L. a) Write a balanced titration reaction. Use the lowest possible whole number coetticients. Omit states-of-matter from your answer.) chen Pad 9 Help (b) wilte two reduction half-reactlons for the dicator electrode. Use the lowest possible w number coe Oma states-of-matter from your answer.) hole re half-reaction: chem Pad 9 Help Greek Sn half-reaction: chem Pad 9 Help ce) select two Nernst equations for the cell voltage 0.139 0.05916 Sn 241 E- 0.139 0,05916 loul [Festi) 0.24 0.732 0.05916 E- 0.241 SnExplanation / Answer
Answer:
a) A stoichiometrically balanced redox reaction is,
Sn2+ + 2 Fe3+ ------------> Sn4+ + 2 Fe2+.
b) 2 Half cell reaction.
i) Fe Half cell reaction:
Fe3+ + 1 e- ------------> Fe2+.
ii) Sn Half cell reaction.
Sn2+ ------------> Sn4+ + 2 e-.
c) Nernst equation gives EMF oc cell as
E = E0 - [(0.05916 /n) log([Reductant]/[Oxident])]
For given cell,
In half cell reaction for Sn it's clear that there involve transfer of 2 electrons and hence,
E = 0.139 - [(0.05916/2) log ([Sn2+]/[Sn4+])]
Answer option (a)
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