Write the reaction equation a) Sio2- K2Sio3- h2Sio3- Sio2- Si B) C- Co2- H2Co3- NaNo3

1 chain:

1) 3SiO2 + 4K = Si + 2K2SiO3 (when silicon oxide interacts with potassium, silicon and potassium silicate are formed);

2) K2SiO3 + 2HCl = H2SiO3 + 2KCl (when potassium silicate interacts with hydrochloric acid, silicic acid and potassium chloride are formed);

3) H2SiO3 = SiO2 + H2O (during the decomposition of silicic acid, silicon oxide and water are formed);

4) SiO2 + 2C = Si + 2CO (when silicon oxide interacts with carbon, silicon and carbon monoxide are formed).

2 chain:

1) C + O2 = CO2 (when carbon interacts with oxygen, carbon dioxide is formed);

2) CO2 + H2O = H2CO3 (when carbon dioxide interacts with water, carbonic acid is formed);

3) To obtain sodium nitrate from carbonic acid, 2 stages are necessary:

H2CO3 + 2NaOH = Na2CO3 + 2H2O (when carbonic acid interacts with sodium hydroxide, sodium carbonate and water are formed);
Na2CO3 + 2HNO3 = 2NaNO3 + CO2 + H2O (when sodium carbonate interacts with nitric acid, sodium nitrate, carbon dioxide and water are formed).