No Service 2:04 PM www-awh.aleks.com ELECTROCHEMISTRY Designing a galvanic c- A

Question

No Service 2:04 PM www-awh.aleks.com ELECTROCHEMISTRY Designing a galvanic c- A chemist designs a galvanic cell that uses these two half-reactions standard reduction potential +0.771 v red +1.00 V Answer the following questions about this cell equation for half-reaction tht happens at the Write a balanced equation for happens at the Write a balanced equation for the overall reaction that powers then Do you have enough O Yes calculate the cel voitage under If you said possible to was voiltage, do so and enter your answerV here. Round your answer to Check

Explanation / Answer

a)

at the anode --> oxidation occurs

the highest potential will be reduced, so we need to invert the lower potential, Fe cell

Fe+2(aq) = Fe+3(aq) + e-

b)

at the cathode --> reduction occurs, this is the highest potential

HNO2(aq) + H+(aq) + e- = NO(g) + H2O(l)

c)

add both species

Fe+2(aq) + HNO2(aq) + H+(aq) + e- = NO(g) + H2O(l) + Fe+3(aq) + e-

simplify

Fe+2(aq) + HNO2(aq) + H+(aq) = NO(g) + H2O(l) + Fe+3(aq)

d)

yes, we hav eneough data

e)

E°cell = Ecathode - EAnode = 1.00-0.771 = 0.229 V

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