Chemical Filtration

The video tutorial demonstrates a practical experiment to remove toxic chemicals from water using potassium permanganate and activated charcoal. Initially, water is contaminated with potassium permanganate, turning it purple. An attempt to filter the water using only filter paper fails, as the chemical is highly soluble. Activated charcoal is then added, which bonds with the chemical and allows it to be filtered out, resulting in purified water. This method is used in public water supplies and aquatic systems to ensure safety and maintain environments.

What is the purpose of using potassium permanganate in the experiment?

• To purify the water

• To contaminate the water

• To change the water's temperature

• To neutralize the water's pH

What happens when the potassium permanganate solution is passed through filter paper?

• The solution becomes colorless

• The potassium permanganate is filtered out

• The water evaporates

• Nothing is filtered out

Why is activated charcoal added to the solution?

• To increase the water's temperature

• To add color to the water

• To chemically bond with and trap potassium permanganate ions

• To dissolve the filter paper

How does activated charcoal remove potassium permanganate from the water?

• By changing the water's pH

• By physically blocking the ions

• By chemically bonding with the ions

• By evaporating the water

What is the result of filtering the mixture with activated charcoal through filter paper?

• The water evaporates

• The water becomes more contaminated

• The water becomes colorless

• The water remains purple

What is one application of activated charcoal in public water systems?

• To remove chemical contaminants

• To add minerals to the water

• To change the water's color

• To increase water pressure

In what other systems is activated charcoal used to maintain a suitable environment?

• In air conditioning units

• In aquariums and sea life centers

• In heating systems

• In food processing plants