oxidising and reducing agents 1.3

Question 1

how to write the ion electron equation of a reaction

Answer 1

-balance atoms present
-balance oxygens by adding water
-balance hydrogens by adding hydrogen ions
-balance charges by adding electrons

Question 2

uses of oxidising agents

Answer 2

-kill bacteria/fungi/viruses
-breakdown coloured compounds

Question 3

examples of good oxidising agents

Answer 3

hydrogen peroxide (H2O2) bleach for hair and clothes and permanganate/dichromate ions acidic solutions

Question 4

reducing agents

Answer 4

-donate electrons (oxidisation) to reduce other reactants
-metals or negative ions
-low electronegativity

Question 5

oxidising agents

Answer 5

-accept electrons (reduction) to oxidise other reactants
-non metal or positive ions
-high electronegativity

Question 6

why does permanganate not need an indicator

Answer 6

because it’s self indicating

Question 7

what happens when permanganate is reduced

Answer 7

changes from purple to colourless