Solutions, suspensions and colloids

Solutions, suspensions and colloids

Ms. Hypolite

Multiple Choice

What is an element?

• A substance that is made up of one type of atom

• A substance made of two or more different atoms chemically bonded to one another. They can only be destroyed by chemical processes.

• A material containing two or more elements or compounds that are in close contact and are mixed in any proportion. They can be separated by physical means.

Multiple Choice

What is a compound?

• A substance that is made up of one type of atom

• A substance made of two or more different atoms chemically bonded to one another. They can only be destroyed by chemical processes.

• A material containing two or more elements or compounds that are in close contact and are mixed in any proportion. They can be separated by physical means.

Multiple Choice

What is a mixture?

• A substance that is made up of one type of atom and can't be reduced to simpler substances.

• A substance made of two or more different atoms chemically bonded to one another. They can only be destroyed by chemical processes.

• A material containing two or more elements or compounds that are mixed in any proportion. They are in close contact and can be separated by physical means.

​Lesson Objectives

​Students should be able to:

1. ​Define the following: solvent, solute and solution

2. ​Identify different types of solutions

3. ​Define a suspension and a colloid

4. Identify differences between solution, a suspension and a colloid

5. ​Give examples of solutions, suspensions and colloids

​What is a Solution?

​A solution is a homogeneous mixture of two or more substances, one of which is usually a liquid.

​

The major component of solution is known as the solvent and the minor component is known as the solute

• ​The substance which does the dissolving is the solvent

• ​The substance being dissolved is the solute

​What are the types of solution?

​Saturated solutions

​A saturated solution is one in which the solvent cannot dissolve any more solute at a particular temperature in the presence of a undissolved solute

​

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​Aqueous solutions

​Solutions in which the solvent is water are known aqueous solutions 

Multiple Choice

What is a Solution?

• It is a heterogeneous mixture

• It is a Homogeneous mixture

• Compose of only solute

• Compose of only Solvent

Multiple Choice

Solutions are made up of

• solute + solution

• solvent + solution

• solute + solvent

• solution + dillution

Multiple Choice

The substance being dissolved is called the ________

• solvent

• solid

• solute

• solvate

Multiple Choice

When a certain amount of solvent cannot hold any more solute it is called a ________ solution.

• Diluted
• Saturated

Multiple Choice

A supersaturated solution is one that....

• contains the maximum amount of dissolved solute.
• contains less solute than a saturated solution.
• contains more solute than a saturated solution.
• is the amount of a substance required to form a saturated solution.

​What is a suspension?

​A suspension is a heterogeneous mixture in which minute, visible particles of one substance are dispersed in another substance, which is usually a liquid.

​

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​What is a colloid?

​A colloid is a heterogeneous mixture of differently sized particles. They do not separate into layers when left to rest.

​

They are an intermediate between a solutions and a suspension

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Multiple Choice

A type of mixture where the particles are larger than those in a solution but not heavy enough to settle out.

• Homogeneous mixture

• Colloid

• Suspension

• Compound

Multiple Choice

What is a suspension?

• A mixture of two or more materials that separate on standing.

• How hard of soft an object is when it hits against another object.

• A mixture between two or more materials that mix together.

Multiple Choice

Sand floating in water, but most of the sand is settled at the bottom this an example of which type of mixture?

• A solution
• A colloid
• A suspension
• A compound

​Comparing solutions, suspensions and colloid 

Multiple Choice

How are suspensions and colloids different?

• Suspensions settle out and colloids do not settle.

• Colloids settle out and suspensions do not settle.

• Suspensions dissolve and colloids do not.

• Colloids dissolve and suspensions do not.

Fill in the Blank

____________: type of mixture that always looks cloudy because clumps of insoluble particles remain suspended throughout it – they don’t settle as sediment

Multiple Choice

Which one is not a colloid

• Foam

• Gel

• Emulsion

• Coffee

Multiple Choice

In this mixture, which of the following will be the solute?

• The water in the glass

• The glass that holds the final mixture

• The solution containing both powder and water

• The powder on the spoon

Multiple Choice

Which is a colloid?

• Air

• Rice in water

• Fog

• Rain water

Multiple Choice

The scattering of light by colloids is called ____. 

• homogeneous
• suspension
• air pollution
• The Tyndall effect