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Guía de ejercicios, Balance de ecuaciones Redox
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Guía de ejercicios, Balance de ecuaciones Redox

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  • 1. EJERCICIOS DE REDOXCalcula el número de oxidación de cada elemento: + 1) Zn 15 ) HF 30 ) NH4 2) Ca 16 ) CaF2 – 31 ) MnO4 3) Fe 17 ) MgCl2 –2 18 ) Na2S 32 ) CrO4 4) H2 –2 5) N2 19 ) NH3 33 ) Cr2O7 6) O2 20 ) CO2 34 ) NaOH 7) P4 21 ) CO 35 ) LiOH + 22 ) AlCl3 36 ) Ca(OH)2 8) H – 23 ) N2O3 37 ) HNO3 9) F + 24 ) N2O4 38 ) H2SO4 10 ) Na 25 ) N2O5 39 ) H3PO4 +2 – 11 ) Cu 26 ) NO3 40 ) HCN +3 12 ) Fe –2 41 ) H4P2O7 27 ) SO4 –2 –2 42 ) NaNO3 13 ) O 28 ) SO3 –2 43 ) Ag2SO4 – 14 ) S 29 ) ClO3 44 ) K2SO3 Iguala las siguientes semi-reacciones, determinando electrones en juego, identificando agente oxidante, agente reductor: – +2 +3 –2 45 ) MnO4  Mn 54 ) Cr  CrO4 –2 +3 – – 46 ) Cr2O7  Cr 55 ) CN  CNO – – –2 –2 47 ) BrO3  Br 56 ) S2O3  S4O6 48 ) H2O2  H2O 57 ) H2C2O4  CO2 – + –2 –2 49 ) NO3  NH4 58 ) S2O8  SO4 – 50 ) H2O2  O2 59 ) NO3  NH2OH – – – 51 ) NO2  NO3 60 ) NO3  NO – – 52 ) I2  IO3 61 ) NO3  NO2 53 ) CH3CH2OH  CH3COOH Iguala las siguientes reacciones redox, identifica agente oxidante y agente reductor: – –2 +2 –2 62 ) MnO4 + SO3  Mn + SO4 +3 – –2 – 63 ) Cr + ClO3  CrO4 + Cl – 64 ) H2O2 + I  I2 65 ) FeCl3 + H2SO3  FeCl2 + H2SO4 66 ) Zn + HNO3  Zn(NO3)2 + NH4NO3 67 ) H3PO3 + HgCl2  Hg2Cl2 + H3PO4 68 ) MnO2 + KNO3 + KOH  K2MnO4 + KNO2 Nury Arancibia Cifuentes
  • 2. RESPUESTAS1 ) al 7 ) número de oxidación = 0 O = –2 N = +58 ) al 14 ) número de oxidación = carga del ión 27 ) S = +6 O = –2 15 ) H = +1 O = –2 38 ) H = +1 F = –1 28 ) S = +4 S = +6 16 ) Ca = +2 O = –2 O = –2 F = –1 29 ) Cl = +5 39 ) H = +1 17 ) Mg = +2 O = –2 P = +5 Cl = –1 30 ) N = –3 O = –2 18 ) Na = +1 H = +1 40 ) H = +1 S = –2 31 ) Mn = +7 C = +2 19 ) N = –3 O = –2 N = –3 H = +1 32 ) Cr = +6 41 ) H = +1 20 ) C = +4 O = –2 P = +5 O = –2 33 ) Cr = +6 O = –2 21 ) C = +2 O = –2 42 ) Na = +1 O = –2 34 ) Na = +1 N = +5 22 ) Al = +3 O = –2 O = –2 Cl = –1 H = +1 43 ) Ag = +1 23 ) N = +3 35 ) Li = +1 S = +6 O = –2 O = –2 O = –2 24 ) N = +4 H = +1 44 ) K = +1 O = –2 36 ) Ca = +2 S = +4 25 ) N = +5 O = –2 O = –2 O = –2 H = +1 26 ) N = +5 37 ) H = +1 – – + +2 45 ) MnO4 + 5e + 8H = Mn + 4 H2 O –2 + +3 – 46 ) Cr2O7 + 6e + 14 H = 2 Cr + 7 H2O – + – – 47 ) BrO3 + 6e + 6H = Br + 3 H2 O – + 48 ) H2O2 + 2 e + 2H = 2 H2 O – – + + 49 ) NO3 + 8e + 10 H = NH4 + 3 H2O – + 50 ) H2O2 = O2 + 2 e + 2H – – + – 51 ) NO2 + H2 O = NO3 + 2e + 2H – + – 52 ) I 2 + 6 H2 O = 2 IO3 + 10 e + 12 H + – 53 ) CH3CH2OH + H2O = CH3COOH + 4 e + 4H +3 –2 + – 54 ) Cr + 4 H2 O = CrO4 + 3e + 8H – – – + 55 ) CN + H2 O = CNO + 2e + 2H –2 –2 – 56 ) 2 S2O3 = S4O6 + 2e + – 57 ) H2C2O4 = 2CO2 + 2 e + 2H –2 – –2 58 ) S2O8 + 2e = 2 SO4 – + – 59 ) NO3 + 6e + 7H = NH2OH + 2 H2O – + – 60 ) NO3 + 3e + 4H = NO + 2 H2O – – + 61 ) NO3 + e + 2H = NO2 + H2O – –2 + +2 –2 62 ) 2 MnO4 + 5 SO3 + 6H = 2 Mn + 5 SO4 + 3 H2 O +3 – –2 – + 63 ) 2 Cr + ClO3 + 5 H2 O = 2 CrO4 + Cl + 10 H – + 64 ) 2 I + H2O2 + 2 H = I 2 + 2 H2 O 65 ) 2 FeCl3 + H2SO3 + H2O = 2 FeCl2 + H2SO4 + 2 HCl 66 ) 4 Zn + 10 HNO3 = 4 Zn(NO3)2 + NH4NO3 + 3 H2O 67 ) H3PO3 + 2 HgCl2 + H2O = H3PO4 + Hg2Cl2 + 2 HCl 68) MnO2 + KNO3 + 2 KOH = K2MnO4 + KNO2 + H2O Nury Arancibia Cifuentes

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