Complete the stoichiometry of each reaction, making sure bothstoichiometry and charge balance are correct. That is, find thevalues of the coefficients A, B, C, etc., for each reaction. Showyour work and explain your reasoning. [2 Points each]
(a) Oxidation of nitrite to nitrate (a chemoautotrophicprocess): A·O2 + B·NO2- = C·NO3-
(b) Oxidation of organic matter using nitrite (a step ofdenitrification, a heterotrophic reaction):
A·CH2O + B·NO2- + C·H+ = D·CO2 + E·N2 + F·H2O
(c) Oxidation of ammonium with nitrite (anammox, a chemoautotrophicprocess):
A· NH4+ + B·NO2- = C·N2 + D·H2O
[Hint: start by writing the 2 half-reactions for each fullreaction, including the number of electrons produced by theoxidation half-reaction, and the numbers of electrons required forthe reduction half-reaction. Then balance H+ and H2O if required bystoichiometry, and sum the half reactions, each multiplied by thefactor required to have the same number of electrons produced andconsumed. End by simplifying terms present in both sides.]
