Question

Помогите пожалуйста. С гидроксидом натрия реагирует: 1. CaO. 3. SiO2. 2. N2O. 4. P2O5

Answer 1

3).SiO2+2NaOH=Na2SiO3+H2O;
4).P2O5+6NaOH=2Na3PO4+3H2O.

Answer 2

Reactivity of Sodium Hydroxide

When sodium hydroxide (NaOH) reacts with different substances, it forms various products. Let's analyze the given options:

1. CaO: When sodium hydroxide reacts with calcium oxide (CaO), it forms calcium hydroxide (Ca(OH)2) according to the following chemical equation: ``` 2 NaOH + CaO → Ca(OH)2 + Na2O ``` 2. SiO2: Sodium hydroxide does not react with silicon dioxide (SiO2) under normal conditions. Therefore, there is no specific chemical reaction between sodium hydroxide and silicon dioxide.

3. N2O: Sodium hydroxide does not react with nitrous oxide (N2O) under normal conditions. Therefore, there is no specific chemical reaction between sodium hydroxide and nitrous oxide.

4. P2O5: When sodium hydroxide reacts with phosphorus pentoxide (P2O5), it forms sodium phosphate (Na3PO4) according to the following chemical equation: ``` 6 NaOH + P2O5 → 2 Na3PO4 + 3 H2O ``` Based on the provided information, the correct answer is: 1. CaO