redox Flashcards
1
Q
what do oxidising agents do
A
cause oxidation, so they themselves are reduced
2
Q
what are the best oxidising agents
A
those best at gaining electrons (highest electronegativity)
3
Q
what are the uses of oxidising agents
A
- kill bacteria/fungi/viruses
- break down coloured compounds
- hydrogen peroxide (bleach for hair and clothes)
4
Q
what do reducing agents do
A
cause reduction, so are themselves oxidised
5
Q
what are the best reducing agents
A
those who want to lose electrons (low electronegativity & form positive ions)
6
Q
how do you do ion electron equations
A
Animals Only Have Chins
- Balance central Atom
- Add water to balance any Oxygens
- Add H+ ions to balance the water H’s
- Balance the Charges by adding electrons
7
Q
what can titrations be used for
A
to find unknown concentrations by using something with a known concentration
8
Q
why is an indicator used
A
to follow the reaction eg universal indicator
9
Q
what is an example of a self indicator
A
potassium permanganate
10
Q
what colour does potassium permanganate change
A
purple to colourless
