Question

Question 5 options: The cell potential for an electrochemical cell with a Zn, Zn2 half-cell and an Al, Al3 half-cell is _____ V. Enter your answer to the hundredths place and do not leave out a leading zero, if it is needed.

Answer 1

The voltage is
`E_(cell) = 0.944 \ V`

Step-by-step explanation:

Generally the half reaction for Zn, Zn2 half-cell is mathematically represented as

`Zn_((s))` ⇔
`Zn^(2+)_( (aq)) + 2e^-` (reference study academy)

and the electric potential for this is a constant value

`E_(zn ) = -0.7618 \ V`

Generally the half reaction for Al, Al3 half-cell is mathematically represented as

`Al^(3+) _((aq)) + 3e^-` ⇔
`Al_((s))`

and the electric potential for this is constant value

`E_(Al ) = -1.662 \ V`

Therefore the cell potential for an electrochemical cell is mathematically represented as

`E_(cell) = E_(zn ) - E_(Al )`

substituting values

`E_(cell) = -0.718 - (-1.662)`

`E_(cell) = 0.944 \ V`