5. Redox Flashcards
what is the oxidation number for pure substances e.g. O2 F2
0
what is the assumed charge for H
+1
what is the assumed charge for O
-2
how do we know if redox has occured
increase & decrease of 2 different species
hydrogen/oxygen are gained/lost
e.g. element goes from 0–> +1 e.g. Fe to Fe2CO3
what is the charge for carbonate (CO3)
+4
what is the opposite of redox
oxidation e.g. freeing up of electrons
what is the relationship with standard electrode potential (E^0) and reactions
inverse, e.g. the higher the reaction strength, the lower the electrode potential
what is para
facing upward in 1D
what is meta
facing right in 1D
what is redox
a decr. in oxidation number / gaining H & loss of O
what are reductants
(rhs of equilibrium arrow)
undergo oxidation and cause the lhs to undergo reduction
what are oxidants
(lhs of equilibrium arrow)
cause reduction
what does Q (reaction quotient) less than K (eq. const) mean
reaction is still progressing, hasn’t reached eq yet
explain Faraday’s law Q = It or Q = n(electrons) * F
the more electrons transferred, the greater the charge. F is a const.
