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Unformatted text preview: other products vary depending on the oxide type:
M2O + H2O → 2MOH
M2O2 + 2H2O → 2MOH + H2O2
MO2 + 2H2O → 2MOH + H2O2 + O2
• Hydroxides are also produced when aqueous solution of MCl are
electrolyzed, from MH and H2O and from M and H2O.
• These are the strongest bases known with basicity increasing Li
<< Na < K < Rb < Cs (any idea why?)
• Reaction of peroxides with water is also used for production of
CHMB31H3 The Chemistry of Group 1 15 Oxides - Overview
M Suboxides Oxides Peroxides Superoxides Ozonides N/a Li2O
White LiO2, stable at
low temp N/a Na N/a Na2O
White Na2O2 (*)
White to pale
Orange, dec. K K2O2 (*)
Yellowish-white Yellow Li N/a NaO3 Dec.
Orange KO3 Dec.
Dark red Rb6O bronze
Rb9O2 red Rb2O
Yellow Rb2O2 (*)
Dark red Cs4O violet
Cs11O3 violet Cs2O
Orange Cs2O2 (*)
Dark red (*) colour
CHMB31H3 varies from white to yellow depending on the MO2 amount in the sample
The Chemistry of Group 1 16 Oxosalts
• Many oxosalts (carbonates, sulfates, nitrates…)
• Solvay soda synthesis is a very important industrial process:
CaCO3 ~ 1300 K Main process CaO + CO2 2H2O +
CO2 preparation NaCl + 2CO2 + 2NH3 + 2H2O Product isolation and
CO2 regeneration Ca(OH)2 NH3
regeneration Na2CO3 + CO2 + H2O CaCl2 +
2NaHCO3 + 2NH4Cl ∆ 2NH3 2NaHCO3...
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