Solution, Colloid or Suspension? The definition in Chemistry and examples (ft. mini quiz)

Summary

This educational video script explores the differences between solutions, suspensions, and colloids. It explains that a solution is a homogeneous mixture where the solute's particles are too small to settle. In contrast, suspensions are heterogeneous mixtures with larger, visible particles that eventually settle due to gravity. Colloids have particles intermediate in size, remaining evenly distributed without settling. The script also mentions the Tyndall effect to distinguish colloids from solutions and encourages viewers to take a mini quiz to test their understanding.

Takeaways

• 🍶 A solution is a homogeneous mixture where the solute is completely dissolved in the solvent, with particles smaller than 10^-9 meters.
• 🌊 A suspension is a heterogeneous mixture with solid particles larger than 10^-6 meters that do not dissolve and are visible, eventually settling due to gravity.
• 🧪 The components of a suspension can be temporarily distributed evenly by mechanical means but will settle over time.
• 🛑 Suspensions can be separated by filtering, unlike solutions.
• 🥛 Milk of magnesia and some medications are examples of suspensions that need to be well mixed before use.
• 🌫️ A colloid is a mixture with particles sized between 10^-8 and 10^-6 meters, remaining evenly distributed without settling.
• 🌈 Colloids can be identified by the Tyndall effect, where a light beam is visible as it is scattered by the larger particles.
• 🚫 Colloid particles are too large to be separated by simple filtration and too small to be seen with the naked eye.
• 📚 The script encourages viewers to watch another video for more information on colloids.
• 📝 A mini quiz is provided at the end of the video to test the viewer's understanding of solutions, suspensions, and colloids.
• ❓ The script poses questions to the audience about different mixtures to determine if they are solutions, suspensions, or colloids.

Q & A

What happens when sand and water are mixed and stirred?

Initially, the mixture may appear homogeneous, but the sand particles gradually sink to the bottom of the container due to gravity, forming a heterogeneous mixture.

What is the difference between a solution and a suspension?

A solution is a homogeneous mixture where the solute is completely dissolved in the solvent, while a suspension is a heterogeneous mixture where solid particles are dispersed throughout the liquid without dissolving.

What is the size range of particles in a solution?

In a solution, the solute particles have a diameter of 10 to the minus 9 meters or less, which allows them to be completely dissolved and evenly distributed.

Can you give an example of a solution?

An example of a solution is salt dissolving in water, where the salt acts as the solute and water as the solvent, forming a homogeneous mixture.

What is the size range of particles in a suspension?

In a suspension, the particles have a diameter greater than 10 to the minus 6 meters and are visible to the naked eye.

How can you separate the components of a suspension?

The components of a suspension can be separated by filtering, as the solid particles settle due to gravity and can be trapped by the filter.

What is a colloid and what is its particle size range?

A colloid is a mixture with particles ranging in size from 10 to the minus 8 to 10 to the minus 6 meters, which are larger than those in solutions but remain evenly distributed without settling.

How can colloids be distinguished from solutions?

Colloids can be distinguished from solutions using the Tyndall effect, where a beam of light passing through a colloid is visible due to the scattering by larger particles.

What is the Tyndall effect and how is it used to distinguish colloids from solutions?

The Tyndall effect is the scattering of light by particles in a colloid, making the light beam visible as it passes through the mixture. This effect is not observed in true solutions, where particles are too small to scatter light.

Why is it important to mix a suspension well before use?

Mixing a suspension well before use ensures that the solid particles are evenly distributed, preventing settling and ensuring the correct dosage or amount of the substance is used, especially in medications.

What are some examples of colloids?

Examples of colloids include aerosols, sols, emulsions, and gels, which are mixtures where one substance is dispersed evenly throughout another in the form of fine particles that do not settle.