Earth's Climate History Short Writing
Active
Prompt
Read Changes on Earth and Changes in Life Explain how changes in Earth's systems affect the growth of life on Earth. Use
evidence from the text to support your answer.
< Read Less
BIUS
TC

i will answer it but what do you do because how the question is wored and we have no passage to read

Explanation:

Given:

E⁰cathode = -0.76 V

E⁰anode = -0.91 V

To determine:

The equilibrium constant K for the reaction-

Cr(s) + Zn2+ (aq) ↔ Cr2+(aq) + Zn(s)

Explanation:

The relation between, E⁰cell and Keq is-

E⁰cell = (0.0592/n) log(Keq)

E⁰cell = E⁰cathode-E⁰anode = -0.76-(-0.91) = 0.15 V

n = # electrons in the reaction = 2

0.15 = (0.0592/2) * logKeq

logKeq = 5.07

Keq = 10⁵.⁰⁷ = 1.17*10⁵

Ans: the equilibrium constant is 1.17*10⁵