Окислительно-восстановительные реакции
K 2 Cr 2 O 7 + HCl (k) = Cl 2 + ….. + KCl + H 2 O Cr e = Cr +3 2Cl -1 -2e = Cl 2 0 K 2 Cr 2 O HCl (k) = 3Cl CrCl 3 +2KCl + 7H 2 O
KMnO 4 + FeSO 4 + H 2 SO 4 = MnSO 4 + K 2 SO 4 + ….. + H 2 O Mn e = Mn +2 Fe e = Fe +3 2 KMnO FeSO H 2 SO 4 = 2 MnSO 4 + K 2 SO Fe 2 (SO 4 ) H 2 O
H 2 O 2 + KMnO 4 + H 2 SO 4 …. + O 2 + K 2 SO 4 + H 2 O Mn +7 +5е =Mn +2 2О -1 – 2 е =O 2 0 5H 2 O KMn +7 O 4 + 3H 2 SO 4 =2Mn +2 SO 4 +5 O K 2 SO 4 + 8H 2 O
PH 3 + HMnO 4 =….. + H 3 PO 4 + H 2 O P -3 – 8 е =P +5 Mn +7 +3е =Mn +4 3P -3 H 3 + 8HMn +7 O 4 =8Mn +4 O 2 + 3H 3 P +5 O 4 + 4H 2 O
Cr 2 (SO 4 ) 3 +KMnO 4 +…=K 2 CrO 4 +K 2 MnO 4 + K 2 SO 4 +H 2 O 2Cr +3 – 6 е =2Cr +6 Mn +7 +1е =Mn +6 Cr 2 +3 (SO 4 ) 3 +6KMn +7 O 4 +16KOH=2K 2 Cr +6 O 4 +6K 2 Mn +6 O 4 +3K 2 SO 4 +8H 2 O
NO+KClO+ KOH=KNO 3 + …+ H 2 O N +2 – 3 е =N +5 Сl +1 +2е =Сl -1 N +2 O+3KCl +1 O+ 2KOH=2KN +5 O 3 + 3KCl -1 + H 2 O
РН 3 + AgNO 3 +H 2 O =… +H 3 PO 4 + HNО 3 Р -3 – 8 е =Р +5 Ag +1 +1е =Ag 0 Р -3 Н 3 + 8Ag +1 NO 3 +4H 2 O =8 Ag 0 +H 3 P +5 O 4 + 8HNО 3