Question

Which of these elements has the lowest standard reduction potential?

A. chlorine

B. iron

C. lithium

D. zinc

Answer 1

Answer: C. lithium

Step-by-step explanation:

Standard reduction potential is the tendency for an element to gain electrons or get reduced ,measured at standard conditions i.e. when concentration is 1 M and temperature is 298 K.

It is given by:
`E^0_(M^+/M)`

`E^0_([Cl^(2)/2Cl^-])=+1.36V`

`E^0_([Fe^(2+)/Fe])=-0.41V`

`E^0_([Li^(+)/Li])=-3.04V`

`E^0_([Zn^(2+)/Zn])=-0.76V`

Thus lithium has the lowest tendency to accept electrons and thus has lowest standard reduction potential.

Answer 2

Standard reduction potential is the likelihood that a species will be reduced. It is written in the form of a reduction half reaction.
Lithium has the lowest standard reduction potential.