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Calculate the potential of the following...

Calculate the potential of the following cell reaction at 298 K
`Sn^(4+)(1.50 M)+Zn(s) to Sn^(2+)(0.50 M)+Zn^(2+)(2.0 M)`
The standard potential, `E^(@)` of the cell is 0.89 V. Whether the potential of the cell will increase or decrease if the concentration of `Sn^(4+)` is increased in the cell.

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