[timchai]

can someone explain why AgNO3 stored in brown bottle , i think it will photodecompose to give NO2 and O2 like HNO3. and also can someone explain the use disodium salt of edta

[BluRay]

can someone explain why AgNO3 stored in brown bottle , i think it will photodecompose to give NO2 and O2 like HNO3. and also can someone explain the use disodium salt of edta

Usually silver salts photodecompose giving metallic silver; in this case it should give Ag, NO₂ and O₂, as you wrote (but I'm not sure).
The use of EDTA is for what kind of reaction?