Reactions And Redox Flashcards
1
Q
Sodium?
A
Very reactive
excellent conductor
less dense than water
exothermic reaction with water
2
Q
Oxidation?
A
loss of electrons
3
Q
Reduction?
A
gain of electrons
4
Q
Oxidation numbers?
A
Charge of ion
free element = 0
5
Q
Redox couples?
A
metal and dissolved ion pair have a tendency to oxidise or reduce, pair is measured against a standard hydrogen electrode.
6
Q
Hydrogen electrode?
A
25 degrees 1 atm 1 mol dm^3 Platinum metal salt bridge
7
Q
More positive Eo?
A
strongly oxidising - gain e-
8
Q
More negative Eo?
A
Strongly reducing - lose e-
9
Q
What do sacrificial anodes do?
A
Slow down the rate at which boats hulls rust
