MoO2 + H2 = Cu2O + H2Mo: +6 -> +4 (reduction)Cu: +2 -> +1 (oxidation)
H2 + K = H2 + SK: 0 -> +1 (oxidation)S: 0 -> -2 (reduction)
K + HCl = Na + H2OK: 0 -> +1 (oxidation)Cl: -1 -> 0 (reduction)
KH + H2O = KH + HClH: +1 -> 0 (reduction)
Итак, в данной последовательности окислитель - Cu2+, восстановитель - H2.
MoO2 + H2 = Cu2O + H2
Mo: +6 -> +4 (reduction)
Cu: +2 -> +1 (oxidation)
H2 + K = H2 + S
K: 0 -> +1 (oxidation)
S: 0 -> -2 (reduction)
K + HCl = Na + H2O
K: 0 -> +1 (oxidation)
Cl: -1 -> 0 (reduction)
KH + H2O = KH + HCl
H: +1 -> 0 (reduction)
Итак, в данной последовательности окислитель - Cu2+, восстановитель - H2.