Write down hydrolysis of:
(i) alkyl substituted chlorosilane , (ii) trialkyl chlorosilane

Answer

To write down the hydrolysis of alkyl substituted chlorosilane and trialkyl chlorosilane, we will follow these steps:

### Step 1: Hydrolysis of Alkyl Substituted Chlorosilane
1. **Identify the structure**: Let's consider a disubstituted chlorosilane, for example, R2SiCl2, where R represents an alkyl group.
2. **Reaction with water**: When this compound undergoes hydrolysis in the presence of water (H2O), the hydroxide ions (OH⁻) from water will react with the chlorine atoms.
3. **Formation of products**: The reaction can be represented as:
\[ R_2SiCl_2 + 2 H_2O \rightarrow R_2Si(OH)_2 + 2 HCl \]
Here, two moles of HCl are produced along with the silanol (R2Si(OH)2).
4. **Polymerization**: The silanol can further polymerize to form siloxanes:
\[ n R_2Si(OH)_2 \rightarrow (R_2SiO)_n + n H_2O \]

### Step 2: Hydrolysis of Trialkyl Chlorosilane
1. **Identify the structure**: Consider a trialkyl chlorosilane, for example, R3SiCl.
2. **Reaction with water**: When this compound undergoes hydrolysis, it reacts with water as follows:
\[ R_3SiCl + H_2O \rightarrow R_3Si(OH) + HCl \]
Here, one mole of HCl is produced along with the silanol (R3Si(OH)).
3. **Polymerization**: Similar to the previous case, the silanol can polymerize:
\[ n R_3Si(OH) \rightarrow (R_3SiO)_n + n H_2O \]

### Final Products
- For the alkyl substituted chlorosilane, the final product is a siloxane polymer.
- For the trialkyl chlorosilane, the final product is also a siloxane polymer.

### Summary of Reactions
1. **Alkyl Substituted Chlorosilane**:
\[ R_2SiCl_2 + 2 H_2O \rightarrow R_2Si(OH)_2 + 2 HCl \]
\[ n R_2Si(OH)_2 \rightarrow (R_2SiO)_n + n H_2O \]

2. **Trialkyl Chlorosilane**:
\[ R_3SiCl + H_2O \rightarrow R_3Si(OH) + HCl \]
\[ n R_3Si(OH) \rightarrow (R_3SiO)_n + n H_2O \]