1)
Ca+O2=CaO
CaO+H2O=Ca(OH)2
Ca(OH)2+K2CO3=CaCO3+2KOH
2)
4As+10 O2=As2O5
As2O5+H2O=H3AsO4
H3AsO4+3NaOH=Na3AsO4+2H2O
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Answers & Comments
1)
Ca+O2=CaO
CaO+H2O=Ca(OH)2
Ca(OH)2+K2CO3=CaCO3+2KOH
2)
4As+10 O2=As2O5
As2O5+H2O=H3AsO4
H3AsO4+3NaOH=Na3AsO4+2H2O