C6 Electrochemistry Flashcards
(8 cards)
1
Q
if both elements are negative, how to assign oxidation number?
A
the more electronegative element is given a negative oxidation number
2
Q
exam tip: any reaction equation involving uncombined raw elements is a redox reaction
A
3
Q
oxidising agent
A
a species that gains electrons and undergoes reduction
4
Q
reducing agent
A
a species that loses electrons and undergoes oxidation
5
Q
disproportionation reaction
A
a reaction where an element is simultaneously oxidised and reduced
6
Q
Cl2 reacts with cold dilute NaOH (aq) equation
A
Cl2 + 2NaOH –> NaCl + NaClO + H2O
7
Q
Cl2 reacts with hot concentrated NaOH (aq)
A
3Cl2 + 6NaOH –> 5NaCl + NaClO3 + 3H2O
8
Q
MnO4^2- reacts with H2O under alkaline condition
A
3MnO4^2- + 2H2O –> 2MnO4- + MnO2 + 4OH-
