Centrifugation and Homogeneous Mixtures

The video tutorial explains centrifugation as a technique for separating particles in a liquid. It uses two mixtures: a homogeneous blue copper sulfate solution and a heterogeneous white calcium carbonate suspension. The mixtures are placed in a centrifuge, which spins them at high speed. This causes the suspended particles to settle at the bottom of the test tube. After centrifugation, the homogeneous mixture remains unchanged, while the calcium carbonate in the heterogeneous mixture separates from the water.

What is the main purpose of centrifugation?

• To mix different substances

• To heat up a solution

• To cool down a solution

• To separate particles suspended in a liquid

Which of the following is a homogeneous mixture mentioned in the video?

• Calcium carbonate in water

• Copper sulfate in water

• Sand in water

• Oil in water

What color is the homogeneous mixture of copper sulfate in water?

• Blue

• Red

• Green

• Yellow

What happens to the particles in a suspension during centrifugation?

• They dissolve completely

• They float to the top

• They evaporate

• They deposit at the bottom of the test tube

Which mixture's components did not separate after centrifugation?

• Oil in water

• Sand in water

• Copper sulfate in water

• Calcium carbonate in water