#### • Class 11 Physics Demo

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#### • redox chemical equation balancer

Question:Okay its really confusing me, can someone help? Acid rain is the result of atmospheric chemical reactions such as the following acid formation reaction: NO2(g) + H2O(l) --> NO(g) + H(+)(aq) + NO3(-)(aq) Balance this redox reaction equation. In the reaction, which element is reduced and which is oxidised? Identify changes in oxidation numbers. Can someone explain step by step with half reaction equations pleaseeee? :) Thanks!

Answers:Balanced redox reaction equation: 3NO2(g) + H2O(l) --> NO(g) + 2H(+)(aq) + 2NO3(-)(aq) That's all i can answer. Sorry =(

Question:The equation is: HBrO3 + Bi -> HBrO2 + Bi2O3 I figured out that the oxidation numbers are H+1, Br+5, O-6, Bi0, H+1, Br+3, O-4, Bi+3, O-2. I understand that Br is reduced, but from my numbers it seems that Bi and O is oxidized. Is that possible? and if so how would i put that into separate equations for the oxidation and reduction reactions?

Answers:I'm not sure about the oxygen but Bi is oxidized because on the reactant side it was an element , element state = 0 charge, and on the right it is part of a compound, and it has a charge

Question:1. ClO- + I - --> Cl- + I3 - 2. Br- + MnO4- --> Br2 + Mn +2 3. CH3OH + CrO7 (charge of 2-) --> CH2O + Cr +3 Please show all of the steps and the half reactions, balancing H and O, balancing charge using e- etc. Thanks and PLEASE HELP MEEE ASAP!