[joeywitter]

Hi all.I'm new here and I'm hoping someone could help me with my chem problems.I'm from Croatia so my English isn't really good,but I'm gonna try my best to explain the problems.

1) I was doing an experiment where we were supposed to define the formula of  the silver oxide.
The method was this:First I had to make of a solution of AgNO3 and H2O(equation?).Then I had to add a few drops of concentrated NaOH in that solution(equation?).Then,after the sediment was made I had to filter it.After  the sediment was dry I  heated  it with a burner.The formula of the oxide is Ag2O but I'm having troubles with showing the partial redox  equations....can anyone help me,PLEASE?
If it's any help,I think that the equations should go like this:
   AgNO3(s) + H2O??
   the thing that occured in the upper eq + NaOH(conc)?Ag2O(s) +?
   Ag2O(s) + O2?Ag + O2

2)The other experiment was getting oxygen from KmnO4.The equation goes like this :
 KmnO4 ?K2MnO4 + MnO2 + O2 but I again need the partial redox equations.

3) I need a partial redox equations for this reaction too : 02 + S8 ? SO2


Please help me anyone....

[Donaldson Tan]

1. silver nitrate is soluble in water. the precipitate formed when u add NaOH to silver nitrate solution is silver hydroxide (AgOH). AgOH decompose under heat to form Ag₂O and water.

3. it's direct balancing of moles

[joeywitter]

Geodome,thank you a lot :Lighten:

[Donaldson Tan]

for question (2),

MnO₄^- -> MnO₂ + O₂ + e

MnO₄^- + e  -> MnO₄^2-