C5: Electrochemistry Flashcards
what are the following values at STP and standard state (respectively)?
- temperature
- pressure
- concentration
- volume
- common uses
- STP: 273K/0C; standard state: 298K/25C
- 1atm (for both)
- STP: n/a; standard state: 1M
- STP: 1 mole of gas=22.4L; standard state: n/a
- STP: gases; standard state: thermodynamics, equilibrium, electrochemisty
what is the oxidation # of anything in elemental form?
0
the sum of oxidation #s of atoms in an ion or molecule equals ___
the net charge
what is the oxidation # of of halogens?
-1
- what is the oxidation # of oxygen?
- what is the exception to this?
- -2
- when its in peroxides its -1
what is the oxidation # of group 1A metals?
+1
what is the oxidation # of group 2A metals?
+2
- what is the oxidation # of hydrogen when bonded to a nonmetal?
- metal?
- +1
- -1
for the following questions if a reactant is being oxidized,
- it _____ (loses/gains) electrons
- its oxidization # is more ____
- it is ____ (reducing/oxidizing) the other reactant
- it is known as the ____ (reducing/oxidizing agent) AKA (reductant/oxidant)
- loses
- positive
- reducing
- reducing agent; reductant
for the following questions if a reactant is being reduced,
- it _____ (loses/gains) electrons
- its oxidization # is more ____
- it is ____ (reducing/oxidizing) the other reactant
- it is known as the ____ (reducing/oxidizing agent) AKA (reductant/oxidant)
- gains
- negative
- oxidizing
- oxidizing agent; oxidant
is a + or - Ecell favored in a reaction?
+
for galvanic cells,
- is Ecell +/-
- is change in GFE +/-
- spontaneous/ nonspontaneous
- do they generate a current?
- are AKA?
- pos.
- neg.
- spontaneous
- yes
- voltaic cell
- salt bridges complete the circuit so ____ doesnt build up
- anions from the salt bridge go to the ____
- cations go to the ____
- charge
- anode
- cathode
for electrolytic cells,
- they apply a ____ source o push an ____ redox rxn to occur
- +/- Ecell
- +/- GFE
- spontaneous/ nonspontaneous
- power; unfavorable
- neg.
- pos.
- nonspontaneous
the anode is the site of ____ and the cathode the site of ____
oxidation; reduction
