Question

Subtract
$e^{2} - 2f^{2} - 7ef \: \: subtracted \: \: e^{2} + f^{2} + 2ef$
pls answer this​

Answer 1

Answer:

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Class 12

>>Chemistry

>>Electrochemistry

>>Galvanic Cells

>>E^∘ for F2 + 2e^-→ 2F^- is...

Question

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E

∘

for F

2

+2e

−

→2F

−

is 2.8 V

E

∘

for 0.5 F

2

+e

−

→F

−

is:

Medium

Solution

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Correct option is

A

2.8 V

F

2

+2e

−

⟶2F

−

F

o

=2.8V

2

1

F

2

+e

−

⟶F

−

E

o

=2.8V

As E

o

is the standard reduction potential and does not depend upon concentration. It is defined per mole.

Answer 2

Step-by-step explanation:

$\sf{ \implies(e ^ { 2 } -2f ^ { 2 } -7ef)-(e ^ { 2 } +f ^ { 2 } +2ef)}$

$\sf{ \implies \: e^{2}-2f^{2}-7ef-e^{2}-f^{2}-2ef }$

$\sf \implies-2f^{2}-7ef-f^{2}-2ef$

$\sf \implies-3f^{2}-7ef-2ef$

$\sf \implies-3f^{2}-9ef$

$\tt \implies-3f\left(f+3e\right)$