Here's why:
* Mortar and Pestle: This tool is specifically designed for grinding and crushing solid materials into a fine powder. The mortar provides a stable base, and the pestle is used to apply pressure and break down the clumps.
Other tools might not be suitable:
* Blender: While it can grind some materials, it's not ideal for chemicals. It might create dust and could be difficult to clean thoroughly.
* Knife: This wouldn't be effective in grinding the clumps into a fine powder.
* Sieve: This is used to separate particles of different sizes, but it won't break down the clumps.
