Important principles of redox reactions

Question 1

Gain electron

Answer 1

reduced, oxidizing agent

Question 2

lose electrons

Answer 2

oxidized, reducing agent

Question 3

Standard reduction potential

Answer 3

E° is index for measuring ability of reductant to lose electrons

Question 4

Redox reactions are always….

Answer 4

paired

Question 5

What does a high °E indicate?

Answer 5

The higher the E° value for a redoc couple means the stronger the oxidant in the redox pair is as an electron acceptor

Question 6

If you can physically separate reactions, then what?

Answer 6

• then you can have an electrochemical cell (battery)
• you can find the free energy of the electrochemical cell
• similar to free energy equation, but instead of Q, we are specificying the concentrations of reducing agent, oxidizing agent etc.

Question 7

∆E, electromotive force

Answer 7

emf, redox potential, or electron pressure, refers to the tendency to push electrons in a certain way, can be found by the nernst equation

Question 8

∆G equation that includes ∆E

Answer 8

∆G = -nF∆E,
∆E must be positive for a spontaneous reaction to occur, due to the existence of the negative sign in the equation
n = moles of electrons

Question 9

electrochemical gradient

Answer 9

nerves, ATP synthase

Question 10

How can these reactions be separated physically?

Answer 10

by establishing an electrochemical gradient.

Question 11

Exergonic discharge of concentration gradient

Answer 11

• drives endergonic process

Question 12

Purpose of electrochemical gradient in ETC

Answer 12

to drive the work of the ATP synthase, forcing premade atp synthase off of the enzyme.