While the term "alum gel" might suggest a gel made directly from alum (a type of hydrated double sulfate salt), the provided reference details the preparation of aluminium hydroxide gel using aluminium chloride solution. Aluminium hydroxide gel is a common form of aluminum gel often used in various applications.
The process outlined in the reference involves heating distilled water and adding a specific concentration of aluminium chloride solution under controlled conditions.
Understanding Aluminium Hydroxide Gel Preparation
Aluminium hydroxide gel is a gelatinous precipitate of aluminium hydroxide (Al(OH)₃). Its properties can vary depending on the preparation method. The method described in the reference uses aluminium chloride (AlCl₃) as the starting material.
Preparing Aluminium Hydroxide Gel: Step-by-Step from Reference
Based on the provided reference, here are the steps to prepare aluminium hydroxide gel:
- Step 1: Prepare the Water Base
Add 100 ml distilled water to a conical flask. - Step 2: Heat the Water
Boil the water using the help of the wire gauze. - Step 3: Prepare Aluminium Chloride Solution
Have the previously prepared 2% aluminium chloride solution ready. (Note: The reference assumes this solution is already prepared). - Step 4: Add Aluminium Chloride Solution
Add 10 ml of the 2% aluminium chloride solution to the boiling distilled water. - Step 5: Controlled Addition
Add this solution with the help of the dropper of the burette.
Following these steps, as described in the reference, will result in the formation of aluminium hydroxide gel.
Key Materials
| Material | Quantity | Notes |
|---|---|---|
| Distilled Water | 100 ml | Used as the base solvent and reaction medium. |
| 2% Aluminium Chloride Solution | 10 ml | The source of aluminium for the gel. |
Process Insights
- Boiling the water helps in the reaction and potentially influences the gel's structure.
- Adding the aluminium chloride solution dropwise or slowly (implied by "with the help of the dropper of the burette") allows for a controlled reaction, which is crucial for gel formation.
This process yields aluminium hydroxide gel, distinct from a gel made purely from alum, although both involve aluminium compounds.
