Photos O S CO

< Previous photo
Photo - 7
Next photo >
O s co. Cr2o3 co CR co2. Cr3+ h2so4. CR+NAOH+h2o2. H2s04 so2.
Cr2o3 co CR co2. Cr3+ h2so4. CR+NAOH+h2o2. H2s04 so2.

See also