Chapter 16: Intro to Electrochem

Reducing agent

An electron donor

Oxidizing agent

Electron acceptor

Gain an electron

Reduction of a species will

Lose an electron

Oxidation of a species will

Reduction

What type of reaction will a cathode electrode make

Oxidation

What type of reaction does an anode electrode make

Low resistance

What type of resistance is in a galvanic cell?

High resistance

What type of resistance is in the electrolytic cell?

Acting anode doesnt reduce naturally

Why is an electrolytic cell highly resistant?

Galvanic cell

What cell can potential energy convert to electrical energy to do electrical work?

Zero

What will be the voltage reached when concentrations of metal ions in the anode and cathode have values that satisfy the equilibrium constant?

Cells without liquid junction

How would you describe a cell in which electrodes share a common electrolyte

Reversible cell

Reversing the current reverses the cell reaction in this cell type

Galvanic cell

A spontaneous cell reaction happens in what cell

Non-spontaneous

What type of cell reaction is an electrolytic cell?

Increases

Does the metal ion concentration of the anode in a low resistance cell increase or decrease in time

Decreases

Does the metal ion of the cathode in a low resistance cell increase or decrease in time?

solute in dilute solution

Standard state of - hypothetical state that has properties of an infinitely dilute solute, but at unit concentration (mol or molal concentration or mole fraction)

solid

Standard state of a - is real state and is the pure solid in its most stable crystalline form

Standard hydrogen electrode

What is the universal reference electrode

Left

A SHE will act as the (-)-hand electrode (oxidized)

Standard electrode potential

The - of a half reaction is defined as its electrode potential when the activities of reactants and the products are all unit activity

Metal ion

E of the cell is equal to E of the - when SHE is the left-hand electrode

Couple

The metal ion/ metal half-cell is sometimes called a

Easily

The E* describes how - a species in a half-cell are reduced compared to H+ ions (w/SHE)

Greater

The - the positive value of E*, the easier it is for them to reduce

Reaction occurs non-spontaneously

What does a positive delta G value mean

Negative

For a spontaneous reaction, what is the sign of delta G