1.na2sio3-h2sio3-sio2-k2sio3 2.ca-cao-ca(oh)2-cacl2 3.zn-zncl2-zn(oh)2-zno

1.
Na₂SiO₃+2H₂O=H₂SiO₃ + 2NaOH;
H₂SiO₃=SiO₂+H₂O;
SiO₂+2KOH=K₂SiO₃+H₂O.

2.
2Ca+O₂=2CaO;
CaO+H₂O=Ca(OH)₂;
Ca(OH)₂+2HCl=CaCl+2H₂O.

3.
Zn+2Cl=ZnCl₂;
ZnCl₂+2NaOH=Zn(OH)2+2NaCl;
Zn(OH)₂=ZnO+H₂O.