Opgave 1.
a] C3H8O + H2O → C3H6O2 + 4 H+ + 4 e-
b] Ox: O2 + 4 H+ + 4 e- → 2 H2O
Redox: C3H8O + O2 → C3H6O2 + H2O
Opgave 2.
a] C4H10O → C4H8O + 2 H+ + 2 e-
b] C4H10O + 2 OH- → C4H8O + 2 H2O + 2 e-
c] IO3- + 3 H2O → H5IO6 + H+ + 2 e-
d] 2 SO32- + 3 H2O + 4 e- → S2O32- + 6 OH-
Opgave 3.
a] CH3OH + H2O → HCOOH + 4 H+ + 4 e-
b] NO2- + H2O → NO3- + 2 H+ + 2 e-
c] PO43- + H2O + 2 e- → PO33- + 2 OH-
d] C4H4O4 + 6 H+ + 6 e- → C4H8O3 + H2O
Opgave 4.
a] C2H6O → C2H4O + 2 H+ + 2 e- (reductor want de elektronen staan rechts van de pijl)
b] H2S + 4 H2O → 10 H+ + SO42- + 8e- (reductor)
c] NH3 + 3 H2O → NO3- + 9 H+ + 8 e- (reductor)
d]
a]
C2H6O → C2H4O + 2 H+ + 2 e- (x2)
O2 + 4 H+ + 4 e- → 2 H2O
2 C2H6O → 2 C2H4O + 4 H+ + 4 e-
O2 + 4 H+ + 4 e- → 2 H2O
+
2 C2H6O + O2 → 2 C2H4O + 2 H2O
b]
H2S + 4 H2O → 10 H+ + SO42- + 8e-
O2 + 4 H+ + 4 e- → 2 H2O (x2)
H2S + 4 H2O → 10 H+ + SO42- + 8e-
2 O2 + 8 H+ + 8 e- → 4 H2O
+
H2S + 2 O2 → 2 H+ + SO42-
c]
NH3 + 3 H2O → NO3- + 9 H+ + 8 e-
O2 + 4 H+ + 4 e- → 2 H2O (x2)
NH3 + 3 H2O → NO3- + 9 H+ + 8 e-
2 O2 + 8 H+ + 8 e- → 4 H2O
+
NH3 + 2 O2 → NO3- + H+ + H2O