Half cells Flashcards
1
Q
3 types of cell
A
-metals in contact with their ions
-non metals in contact
-ions of the same element
2
Q
Draw a labelled model of 2 half cells metal in contact
A
-2 beakers filled with 1 moldm^-3 of each metal solution
-metal electrode labelled
-volumeter connected to metal electrode
-salt bridge made out of paper soaked in aqueous KNO3
-labels the wire connecting the voltmeter
3
Q
Define standard electrode potential
A
-The EMF of a half cell compared with the standard hydrogen half cell, measured at 298k with the solution concentrations of 1 moldm^-3 and gas pressure of 100kpa
4
Q
less positive is
more positive
A
oxidised
reduced
5
Q
one that is oxidised is better
one that’s reduced is better
A
reducing agent
oxidising agent
