Chemistry, 29.09.2019 05:00 pablohc200021

What is the overall cell potential for this redox reaction?
ba + ca2+ → ba2+ + ca
given: ba2+ + 2e− → ba(s) –2.90 and ca2+ + 2e− → ca(s) –2.87

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Answer from: emfranco1

Explanation:

It is known that in an electrochemical cell, chemical reaction occurring at the electrodes generates a potential difference.

In an electrochemical cell, oxidation process occurs at anode and reduction process occurs at cathode.

For example, $Ba^{+} + Ca^{2+} \rightarrow Ba^{2+} + Ca$

Cathode: $Ca^{2+} + 2e^{-} \rightarrow Ca$

Anode : $2Ba^{+} \rightarrow Ba^{2+} + 2e^{-}$

Also, it is known that when more negative is the value of $E^{o}$ more easily an atom can lose electrons. Hence, oxidation will occur where $E^{o}$ value is more negative.

Thus, calculate the overall cell potential as follows.

$E^{o}$ = $E^{o}_{cathode}$ - $E^{o}_{anode}$

= [-2.87 - (-2.90)] V

= 0.03 V

Thus, we can conclude that overall cell potential for the given redox reaction is 0.03.

Answer from: Quest

a galvanic cell( aka voltaic cell) and electrolytic cell

explanation:

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Answer from: Quest

1.consider the following balanced equation and answer parts a through. show calculations for each part.

3 ag(s) + 4 hno3(aq) → 3 agno3(aq) + no(g) + 2 h2o(l)

a. calculate the number of moles of agno3 produced by the reaction of 3 moles of ag with excess hno3. if the number to the left of the compound represents the number of moles of the compound which are present, then 3 moles of ag react with 4 moles hno3 to produce 3 moles agno3 (aq).

so the answer to a would be 3 moles.

b. calculate the number of moles of agno3 produced by the reaction of 108 grams of ag with excess hno3.

i'm not sure how to plug in the grams of silver into an equation using moles to find how many moles are produced.

c. calculate the number of grams of agno3 produced by the reaction of 108 grams of ag with excess hno3

d. calculate the number of moles of no produced as a byproduct of the reaction of 108 grams of ag with excess hno3.

e. calculate the number of grams of no produced as a byproduct starting with 108 grams of ag and excess hno3.

explanation:

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What is the overall cell potential for this redox reaction?
ba + ca2+ → ba2+ + ca
given...

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