chemistry balancing equations

Equation 1 (Complex Redox - Acidic): MnO4^{-} + C2O4^{2-} + H^{+} \rightarrow Mn^{2+} + CO2 + H_2O

2MnO4^{-} + 5C2O4^{2-} + 16H^{+} \rightarrow 2Mn^{2+} + 10CO2 + 8H_2O

Equation 2 (Multi-element Redox): As2S3 + HNO3 + H2O \rightarrow H3AsO4 + H2SO4 + NO

3As2S3 + 28HNO3 + 4H2O \rightarrow 6H3AsO4 + 9H2SO4 + 28NO

Equation 3 (Dichromate Titration): K2Cr2O7 + FeSO4 + H2SO4 \rightarrow Cr2(SO4)3 + Fe2(SO4)3 + K2SO4 + H_2O

K2Cr2O7 + 6FeSO4 + 7H2SO4 \rightarrow Cr2(SO4)3 + 3Fe2(SO4)3 + K2SO4 + 7H_2O

Equation 4 (Phosphorus Disproportionation): P4 + NaOH + H2O \rightarrow PH3 + NaH2PO_2

P4 + 3NaOH + 3H2O \rightarrow PH3 + 3NaH2PO_2

Equation 5 (Ore Roasting Redox): FeCr2O4 + Na2CO3 + O2 \rightarrow Fe2O3 + Na2CrO4 + CO2

4FeCr2O4 + 8Na2CO3 + 7O2 \rightarrow 2Fe2O3 + 8Na2CrO4 + 8CO2

Equation 6 (Complex Metal Dissolution): Au + HNO3 + HCl \rightarrow HAuCl4 + NO + H_2O

Au + HNO3 + 4HCl \rightarrow HAuCl4 + NO + 2H_2O

Equation 7 (Thiosulfate Reaction): Na2S2O3 + I2 \rightarrow NaI + Na2S4O_6

2Na2S2O3 + I2 \rightarrow 2NaI + Na2S4O_6

Equation 8 (Potassium Permanganate in Acidic HCl): KMnO4 + HCl \rightarrow KCl + MnCl2 + H2O + Cl2

2KMnO4 + 16HCl \rightarrow 2KCl + 2MnCl2 + 8H2O + 5Cl2

Equation 9 (Organic Redox - Ethanol Oxidation): K2Cr2O7 + C2H5OH + H2SO4 \rightarrow Cr2(SO4)3 + CH3COOH + K2SO4 + H2O

2K2Cr2O7 + 3C2H5OH + 8H2SO4 \rightarrow 2Cr2(SO4)3 + 3CH3COOH + 2K2SO4 + 11H2O

Equation 10 (Copper with Dilute Nitric Acid): Cu + HNO3 \rightarrow Cu(NO3)2 + NO + H2O

3Cu + 8HNO3 \rightarrow 3Cu(NO3)2 + 2NO + 4H2O