Составь уравнения

\(\mathrm{SiO\_2}\) — кислотный оксид, но \(\mathrm{SiO\_2 + H\_2O} \not =\) :

1. \(\mathrm{SiO\_2 + Na\_2O} \overset{t}=\) [ ];

2. \(\mathrm{SiO\_2} +\) [2|3|4] \(\mathrm{KOH} \overset{t}=\) [ ] \(+\) [ ];

3. \(\mathrm{SiO\_2 + CaCO\_3}=\) [ ] \(+\) [ ].