Images NA2S H2O2

< Previous photo
Photo - 36
Next photo >
Na2s h2o2. K2o+h2so4. K2cr207+h2-. Cr2o3 h2so4 разб. K2cr2o4 h2so4.
K2o+h2so4. K2cr207+h2-. Cr2o3 h2so4 разб. K2cr2o4 h2so4.

See also