Question

Sio2 +NaOH= SO3+NaOH= Na2O+SiO2= CaO+CO2=

Answer 1

SiO2+ 2NaOH=Na2SiO3+H2O
SO3+2NaOH=Na2SO4 + H2O
Na2O+SiO2=Na2SiO3
CaO+CO2=CaCO3

Answer 2

Let's break down the reactions you provided one by one:

1. SiO2 + NaOH: This reaction does not occur directly. Sodium hydroxide (NaOH) is a strong base, while silicon dioxide (SiO2) is an acidic oxide. They do not readily react with each other to form a new compound. However, in certain conditions, such as at high temperatures or in the presence of fluxing agents, silicon dioxide can react with sodium hydroxide to form sodium silicate (Na2SiO3).

2. SO3 + NaOH: When sulfur trioxide (SO3) reacts with sodium hydroxide (NaOH), it forms sodium sulfate (Na2SO4). The reaction can be represented as follows: SO3 + 2NaOH -> Na2SO4 + H2O

3. Na2O + SiO2: When sodium oxide (Na2O) reacts with silicon dioxide (SiO2), it forms sodium silicate (Na2SiO3). The reaction can be represented as follows: Na2O + SiO2 -> Na2SiO3

4. CaO + CO2: When calcium oxide (CaO), also known as quicklime, reacts with carbon dioxide (CO2), it forms calcium carbonate (CaCO3). The reaction can be represented as follows: CaO + CO2 -> CaCO3

Please note that chemical reactions can be influenced by various factors such as temperature, pressure, and the presence of catalysts. The reactions I described above are general representations of the reactions between the given compounds.