need help from the whole problem. thanks. Use the References to access important

Question

need help from the whole problem. thanks.

Use the References to access important v Enter electro A voltaic cell is constructed in which the anode is a Zn Za2+ half cell and the cathode is a Co Co2t half cell. The half-cell compartments are connected by a salt bridge (Use the lowest possible coefficients. Use the pull-down boxes to specify states such as (aq) or (). If a box is not needed, leave it blank) The anode reaction is The cathode reaction is The net cell reaction is In the external circuit, electrons migrate the Co Co2+ electrode the Zn Zn2+ electrode. In the salt bridge, anions migrate from Co2 compartment the Za Zn2+ compartment. to

Explanation / Answer

anode:

must be the lowest potential

Co2+ + 2 e Co(s) 0.28; Zn2+ + 2 e Zn(s) 0.7618

the, this is Zinc:

Zn(s) = Zn2+(aq) + 2e-

b)

cathode --> imlpies gain of e-, this is th ehighest E° potential

Co+2(aq) + 2e- = Co(s)

c)

net reaction

Zn(s) + Co+2(aq) = Zn2+(aq) + Co(s)

d)

electrons go from anode to cathode, that is, from Zn to Co

e)

the salt bridge will:

cause anion migration, due to disspaearing Co2+, therefore it goes to Co2+

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