Question

Si-SiO2-Na2SiO-H2SiO3

Answer 1

Ответ:

Si + O₂ = SiO₂

SiO₂ +Na₂O (t)= Na₂SiO₃

Na₂SiO₃ + 2HBr = H₂SiO₃↓ + 2NaBr

Answer 2

The sequence "Si-SiO2-Na2SiO-H2SiO3" represents a series of chemical compounds involving silicon and oxygen. Let's break down each component:

1. Si: Si represents silicon, a chemical element with atomic number 14. It is a hard, brittle crystalline solid and is the second most abundant element in the Earth's crust after oxygen.

2. SiO2: SiO2 refers to silicon dioxide, also known as silica or quartz. It is a common compound found in nature, occurring as a major component in sand, rocks, and minerals. Silicon dioxide is used in various industries, including glass manufacturing, electronics, and construction.

3. Na2SiO: Na2SiO represents sodium silicate, a compound formed by the reaction of sodium hydroxide (NaOH) with silicon dioxide (SiO2). Sodium silicate is a colorless, viscous liquid or white solid and is used in a wide range of applications such as detergents, adhesives, cement, and as a raw material for the production of silica gel.

4. H2SiO3: H2SiO3 refers to silicic acid, which is formed when silicon dioxide (SiO2) reacts with water (H2O). Silicic acid exists in various forms depending on the concentration and temperature. It is a weak acid and can undergo condensation reactions to form various silicates.

Overall, the sequence "Si-SiO2-Na2SiO-H2SiO3" represents a series of compounds related to silicon and oxygen, starting from elemental silicon (Si) and progressing through silicon dioxide (SiO2), sodium silicate (Na2SiO), and silicic acid (H2SiO3).