3. Oxidising and Reducing Agents

what is an oxidation reaction

a process in which electrons are lost

what is an reduction reaction

a process in which electrons are gained

what is a redox reaction

when 1 substance is reduced and another in oxidised

what is an oxidising agent

a chemical that acts on another substance and causes it to be oxidised and in doing so becomes reduced

what is an reducing agent

a chemical that acts on another substance and causes it to be reduced and in doing so becomes oxidised

what is an oxidising agent in terms of electrons

an electron acceptor

what is an reducing agent in terms of electrons

an electron donor

what side of the electrochemical series are the oxidising agents

left

what side of the electrochemical series are the reducing agents

right

what part of the electrochemical series have the best oxidising agents

bottom left

what part of the electrochemical series have the best reducing agents

top right

what is a displacement reaction

a redox reaction in which 1 element is replaced by another in a compound

what is the colour change in permanganate

purple → colourless

what is the colour change in dichromate

orange → green

what do both permanganate and dichromate need for a reaction

source of H+(aq) ions

what are the steps for making redox equations

find species of all atoms

find them on the electrochemical series

pick the lowest thing on the left

write it out from left to right

pick the highest thing on the right

write it out from right to left

what is the process of writing balanced ion electron equations

balance non oxygen elements

add water to balance the oxygen

add hydrogen ions to balance hydrogen

add extra electrons to balance charge

what are uses of oxidising agents

bleaches

disinfectants

why isnt a indicator needed when acidified permanganate and acidified dichromate are used in a titration

theyre self indicators

what is a standard solution

a solution with a known concentration

how should a burette be prepared for a titration

rinse with solution

fill burette above the scale with solution

filter funnel used should be removed