Answer to Question #349305 in General Chemistry for soph

Question

Balance the following redox reaction in an acidic solution using any method you prefer (oxidation number or half reaction). H2PO2 - + TeO4 2-  PO4 3- + Te

Answer 1

Na₂Te⁶⁺O₄ + H₃P⁺O₂ = Na₂HP⁵⁺O₄ + Te⁰ + H₃PO₄ + H₂O

Te⁶⁺ + 6 e^- => Te⁰

P⁺ – 4 e^- => P⁵⁺

2Na₂TeO₄ + 3H₃PO₂ = 2Na₂HPO₄ + 2Te + H₃PO₄ + 2H₂O