electrochem

Question 1

What is the anode

Answer 1

the site of oxidation, it produces electrons

Question 2

what is the cathode

Answer 2

the site of reduction, it consumes electrons

Question 3

What is the reducing agent

Answer 3

it is what is oxidized, it produces electrons to cause the reduction of the other substance

Question 4

what is the oxidizing agent?

Answer 4

it is what is reduced, it consumes the electrons produced by the reducing agent

Question 5

Why do the electrons flow and in which direction?

Answer 5

They spontaneously flow from the anode to the cathode due to a difference in potential energy

Question 6

What does it mean when Ecell is positive?

Answer 6

It means the redox reaction is spontaneous

Question 7

What happens to the mass of the solid at the anode?

Answer 7

It decreases as more of it becomes aqueous

Question 8

What happens to the mass of the solid at the cathode

Answer 8

it increases as the aqueous solution consumes the electrons to form the solid

Question 9

What does it mean when a Half reaction is more positive?

Answer 9

It favors reduction and is a better oxidizing agent

Question 10

What does it mean when a half reaction is more negative

Answer 10

the back reaction favors oxidation and is a better reducing agent

Question 11

An oxidizing agent will ________ any reducing agent that is

Answer 11

an oxidizing agent will oxidize any reducing agent that is below it

Question 12

A reducing agent will _______ any oxidizing agent that is

Answer 12

reduce any oxidizing agent that is above it

Question 13

How do we know if a metal will dissolve in acid?

Answer 13

Any metal below H2/H^+ will dissolve in acid

Question 14

what happens to the concentration of the solution at the anode?

Answer 14

It increases as the solid mass goes down

Question 15

what happens to the concentration of the solution at the cathode

Answer 15

it decreases as the aqueous solution forms more solid (causing the mass to increase)

Question 16

When is a reaction more spontaneous in the forward direction relative to its concentrations?

Answer 16

A reaction is more spontaneous at lower product concentrations, it shifts towards the product side to produce more

Question 17

When is a reaction less spontaneous relative to its concentrations?

Answer 17

A reaction is less spontaneous when it has fewer reactant concentrations

Question 18

What are concentration cells?

Answer 18

They are half cells that contain the same substance but the concentrations of aqueous solutes are different.

Question 19

What is the dilute and concentrated cell?

Answer 19

The dilute cell has a lower concentration than the concentrated cell. The electrons flow from the diluted cell to the concentrated cell.

This causes the aqueous solution in the concentrated cell to consume the electrons and form more solid, thereby decreasing its overall concentration to offset equilibrium

Question 20

when dealing with a concentrated cell of the same substance, what is true about E°cell at std?

Answer 20

at std the concentrations are the same so the E°cell would be 0.00