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Filtration is most commonly used to separate solids from liquids or gases. Generally, solids are much larger particles than the particles of liquids or gases. Filtration takes advantage of this size difference of these particles by passing the mixture over a surface that has holes that are small enough to allow only the liquid or gas through. A coffee filter is a great example of this process. The ground coffee cannot pass through the paper filter, however, the water can pass through.

Filtration: The suitable example for separating coffee liquid from ground

Introduction:
Filtration is a common method used to separate a solid-liquid mixture by passing it through a filter medium. In this process, the solid particles are retained on the filter while the liquid passes through. A coffee filter is a perfect example of filtration as it effectively separates the coffee liquid from the ground coffee beans.

Explanation:
Filtration is based on the principle of size exclusion, where the filter has small pores that allow the liquid to pass through but retain the solid particles. Coffee filters are typically made of porous paper or fabric with tiny holes that only allow the liquid coffee to flow through while trapping the coffee grounds.

Process:
The process of using a coffee filter to separate coffee liquid from the ground coffee is as follows:

- Step 1: Place the coffee filter in a filter holder or a coffee machine.
- Step 2: Add the ground coffee to the filter.
- Step 3: Slowly pour hot water over the ground coffee.
- Step 4: The hot water passes through the filter, allowing the liquid coffee to drip into a container.
- Step 5: The coffee grounds are retained in the filter, preventing them from entering the liquid coffee.

Advantages of Filtration:
Filtration has several advantages that make it a suitable method for separating coffee liquid from ground coffee:

- Simple and easy to use: Filtration does not require complex equipment or techniques, making it accessible to anyone.
- Cost-effective: Coffee filters are inexpensive and readily available, making filtration an affordable method.
- Efficient separation: Filtration effectively separates the coffee liquid from the ground coffee, ensuring a clean and smooth cup of coffee.
- Minimal wastage: The retained coffee grounds can be discarded or used for composting, minimizing wastage.

Conclusion:
In conclusion, a coffee filter is a suitable example of filtration. It effectively separates the coffee liquid from the ground coffee by passing it through a filter medium. Filtration is a simple, cost-effective, and efficient method for obtaining a clean cup of coffee without any coffee grounds.