The Zinc/silver oxide cell is used in hearing aids and electric watches
`ZnrarrZn^(2+)+2bare`
`E^@=0.76V`
Ag_2O+H_2O+2barerarr2Ag+2OH^(-)`
`E^@=0.344V`
Which is oxidised and which is reduced?

In a simple electrochemical cell, which is in the standard state, the half cell reactions with their appropriate reduction potentials are: Pb^(2+)(aq)+2barerarrPb(s) , (E^@=+0.13V) . Ag^(+)(aq)+barerarrAg(s) , E^@=+0.80V) What is the cell reaction for the cell?

Tarnished silver contains Ag_2S . Can this tranish be removed by placing tranished silver articels in an aluminium pan containing an inert electrolyte solution such as NaCl? The standard electrode potentials for the half cell reactions are: Ag_2S(s)+2barerarr2Ag(s)+S^(2-)(aq) , E^@=-0.71V and Al^(3+)+3barerarrAl(s) , E^@=-1.66V .

The standerd potential at 25^(@) for the following Half rection is given : Zn^(2+)+2e^(-)toZn,E^(@)=-0.762 V Mg^(2+)+2e^(-)toMg,E^(@)=-2.37 V When Zinc dust is added to the solution of MgCl_(2) .

In the button cell widely used for watches and other devices, the following reaction takes place: Zn(s)+Ag_2O(s)+H_2O(l)rarrZn^(2+)(aq)+2Ag(s)+2OH^(-)(aq) Determine the value of K_c for the above reaction using the following data? AgO_2(s)+H_2O(l)+2barerarr2Ag(s)+2Oh^(-)(aq) ( E^@=0.344V ) Zn^(2+)(aq)+2barerarrZn(s) ( E^@=-0.76V )

Can a zinc spoon be used to stir a solution of copper sulphate? Support your answer with reason E_(Zn^(2+)|Zn)^@=-0.76V , E_(Cu^(2+)|Cu)^@=+0.34V

In the button cells widely used in watches and other devices the following reaction takes place: Zn(s) + Ag20(s) + H2O(l) Zn2+(aq) + 2Ag(s) + 20H“(aq) Determine rG and E for the reaction.

Consider the following half cell reaction: Br_2+2barerarr2Br^- , E^@=1.09V I_2+2barerarr2I^- , E^@=0.54V If I_2 and Br_2 are added to solution containing 1M concentration of I^- and Br^- resepctively. How will the increase in the concentration of Br^- affect E_(cell) ?

Name the substance oxidised, reduced, oxidising agent, reducing agent in the following recations: 2H_2S(g) + SO_2(g) rarr 3S(s) + 2H_2O(l)

Name the substance oxidised and substance reduced in the following reactions: CuO+H_2 rarr Cu+H_2O

H_2O_2 is acting as a reducing agent as well as oxidising agent