Initial agglomeration of the colloidal particles is achieved by adding a chemical Blank 1 Question 3 and the process is known as Blank 2 Question 3 .

1. Chemical for Agglomeration: The initial agglomeration of colloidal particles is typically achieved by adding a chemical called a "coagulant" or "flocculant." These chemicals help to neutralize the charges on the colloidal particles, allowing them to come together and form larger aggregates. Common examples of coagulants include alum (aluminum sulfate) and ferric chloride.

2. Process Name: The process of agglomerating colloidal particles through the addition of a coagulant is known as "coagulation." This process is a crucial step in water treatment and separation processes, where it aids in the removal of suspended solids and impurities in liquids.

In summary, the answers to your blanks are:

• Blank 1: Coagulant
• Blank 2: Coagulation