Redox Reactions

Flashcards reviewing key vocabulary and concepts related to redox reactions.

__ - also known as Electrochemistry- is short for ‘reduction - oxidation’

A reaction in which reactants undergo oxidation and reduction simultaneously

Reduction - when a __

The species gains electrons

Oxidation - when a __

The species loses electrons

Reducing __

The species that is oxidised because it works to reduce another species

Oxidising __

The species that is reduced because it works to oxidise another species

According to oxidation numbers rules, __

The sum of all the oxidation numbers in a molecule or a polyatomic ion equals the charge on the particle (0 for molecules).

In the reaction Mg (s) + Cu(NO3) 2 (aq) → Mg(NO3)2 (aq) + Cu (s), __ is oxidation.

Mg(s) →(increase) Mg^2+(aq) + 2e-

In electrolytic cells, power is connected to an electrode – __

When electrons are being pushed into this electrode it is negative and is the site for reduction – gain of electrons – making it the cathode

At the positive electrode in electrolytic cells, __

Electrons are sent back to the power supply, therefore lost, making this the site of oxidation

Types of electrochemical cells - __

Galvanic (or voltaic) cell - eg battery (converts chemical energy → electrical energy)

Types of electrochemical cells - __

Electrolytic cell Eg electrolysis (process of splitting water to hydrogen and oxygen) (converts electrical energy → chemical energy) electrical decomposition. Using electricity to drive a chemical reaction.

Key industrial uses of Electrolytic cells include: __

Extraction and Refining of Metals

Key industrial uses of Electrolytic cells include: __

Production of Chemicals

Key industrial uses of Electrolytic cells include: __

Electroplating

Key industrial uses of Electrolytic cells include: __

Energy Storage and Conversion

Key industrial uses of Electrolytic cells include: __

Wastewater Treatment and Environmental Applications

Standard conditions in a half cell include __

temp of 298 k (or 25℃), pressure of 1 atms, and concentration of 1m of solutes in solution.

SHE cell (Standard Hydrogen Electrode) Half equation: __

2H+(aq) + 2e- → H2(g), EΘ lv = 0.00

Determine the EΘcell for the voltaic cell formed by the reaction using __

EΘred - EΘoxi