Lesson 1.B

Multiple Choice

What are the two classification of matter?

• Organic and inorganic substances
• Solids and liquids
• Elements and compounds
• Pure substances and mixtures

Multiple Choice

What is the difference between pure substance and mixtures?

• Pure substances can be easily separated into components; mixtures cannot.
• Mixtures have a fixed boiling point; pure substances have variable boiling points.
• Pure substances are always solid; mixtures can be liquid or gas.
• Pure substances have a fixed composition; mixtures have variable compositions.

Multiple Choice

What is the difference between element and compound?

• An element consists of one type of atom, while a compound consists of two or more different elements chemically bonded.
• Elements can be broken down into simpler substances, while compounds cannot.
• An element can be made of multiple types of atoms, while a compound is a single type of atom.
• Compounds are always gases, while elements can be solids, liquids, or gases.

Multiple Choice

Is this a molecule or a compound?

• a molecule only

• a compound only

• both a molecule and a compound

Multiple Choice

Is this a molecule or a compound?

• a molecule only

• a compound only

• both a molecule and a compound

Multiple Choice

Which among the following is a homogeneous mixture?

• Sugar

Poll

Can you separate mixtures?

• YES

• NO

Separation Techniques

Lesson 1.B.

LEARNING TARGET

• I can identify different simple separation techniques for mixtures.

• I can describe how and when to use each technique.

• I can give examples of real-life applications of these techniques.

Analyze the scenario then answer the corresponding guide questions.

Science SOS: Separate to Survive!

Open Ended

"Your plane suddenly crushed in an island and luckily you survived. The island is full of fruit bearing plants but no source of fresh water."

Guide Questions

1. What would you do to convert the ocean water into potable water? How?

2. Which separating method could be used to separate water and salt from sea

water?

ACTIVITY 7. Separating Mixtures at Home

Results:

What did you separate in each step? What did you observe?

CONCLUSION

• What physical property helped in each separation?

• What techniques were effective?

• What did you learn?

• When are you going to use each separation technique? Give explanations to each. Also, give one (1) real life example for each.

Multiple Choice

Mr. Santos wants to separate the Rivets that were accidentally thrown in dipper with water. What separation technique should he used for his problem?

• Adsorption

• Decantation

• Centrifugation

• Distillation

Multiple Choice

Mrs. Lazada task her students to collect iron fillings in the sand and study their physical properties in her Physics class. What separation technique should be used to collect iron fillings from the sand?

• Filtration

• Simple distillation

• Adsorption

• Magnetism

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Multiple Choice

Magdalena wants to separate the salt crystals from salt solution, what separation technique is best used for the set-up?

• Fractional distillation

• Simple distillation

• Filtration

• Evaporation

Multiple Choice

Smaller particles pass through a filter paper, larger particles get trapped.

• Distillation

• Filtration

• Decantation

• Recrystallization

Multiple Choice

• Filtrate

• Dessicant

• Centrifuge

• Filtrant

• Decanted liquid

Open Ended

Copper oxide is black and copper sulfate solution is blue.

Explain why you would obtain a blue filtrate and a black residue if you filter this mixture.

Summary

Other Separation Techniques

Separation methods help us to separate out a mixture

How we separate the mixture depends on what's in the mixture!

For example...

Say you went to the beach! You used your bucket to scoop up some water but realised there was a lot of sand in there...

What could you do?!

Multiple Choice

Is sand soluble or insoluble?

• Soluble

• Insoluble

Sand is insoluble!

This means that the sand will NOT dissolve in the seawater!

So, you can see and touch the sand in the bucket - so how could you separate this mixture in the lab.

Multiple Choice

Describe how you could separate an INSOLUBLE material (e.g. sand) from a solution.

• Crystallisation

• Filtration

• Distillation

• Chromatography

Filtration

Filtration is used to separate an insoluble substance from a solution.

Multiple Choice

Where will the sand be left after filtration?

• In the filter paper

• In the conical flask

Multiple Choice

Where will the seawater be left after filtration

• In the filter paper

• In the conical flask

Success!

You have managed to remove the INSOLUBLE sand from your mixture! All that filtering has made you thirsty, so you decide to take a sip...

YUCK!

The water is salty!

Multiple Choice

There must be salt dissolved in the water! This means that salt is...

• Soluble

• Insoluble

That's right! Salt is soluble!

Something that is soluble CANNOT be removed by filtration! What should you do now...?

Multiple Choice

If I want to keep the salt but get rid of the water I should use...

• Filtration

• Crystalisation

• Distillation

• Chromatography

Crystallisation!

This helps me evaporate all of the water in a solution and just leaves the soluble material (e.g. salt).

What if I wanted to keep the water from my salty mixture?

Multiple Select

To separate the water from a solution I should use...

• Filtration

• Crystalisation

• Distillation

• Chromatography

Distillation separates the water from a solution!

Multiple Choice

Where is the water being evaporated in distillation?

Poll

What technique is this?

• Simple Distillation

• Fractional Distillation

Simple Distillation

Principle:

• Based on difference in boiling points between two components.

• The component with the lower boiling point evaporates first and is then condensed back to liquid.

Principle:

• Based on difference in boiling points between two components.

• The component with the lower boiling point evaporates first and is then condensed back to liquid.

SIMPLE DISTILLATION

Best For:

• Separating a liquid from a non-volatile solute or solid, or

• Two liquids with very different boiling points (difference of ≥ 25–30°C).

SIMPLE DISTILLATION

Multiple Choice

Where is the pure water being collected in distillation?

Poll

What technique is this?

• Simple Distillation

• Fractional Distillation

Multiple Choice

Where is the water being condensed in distillation?

Examples:

• Purifying water from saltwater

• Separating ethanol (78°C) from a high-boiling impurity

• Getting distilled water in labs

SIMPLE DISTILLATION

Principle:

• Also based on boiling point differences, but uses a fractionating column to allow for repeated vaporization-condensation cycles.

• More efficient at separating liquids with close boiling points.

FRACTIONAL DISTILLATION

Best For:

• Separating mixtures of two or more liquids with small differences in boiling points (less than 25°C).

FRACTIONAL DISTILLATION

Examples:

• Separating crude oil into gasoline, diesel, kerosene

• Separating alcohol and water more precisely

• Industrial separation of liquid air (oxygen, nitrogen, etc.)

FRACTIONAL DISTILLATION

Multiple Choice

What separation technique is this?

• Chromatography
• Centrifugation
• Distillation
• Filtration

Multiple Choice

chromatography separates the mixture of dyes on the basis of their ----------------------------

• density
• solubility
• gravity
• boiling point

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Multiple Choice

The diagram shows the apparatus for separating soil and water. What are the labelled parts?

• A = distillate, B = filtrate
• A = filtrate, B = residue
• A = residue, B = filtrate
• A = residue, B = distillate

Multiple Choice

Which separation technique uses the apparatus shown in the diagram?

• filtration

• evaporation

• distillation

• chromatography

Multiple Choice

Water and alcohol are easily separated by distillation because of their

• different densities
• different boiling points
• different colours
• different melting points

Multiple Choice

Which of the following pairs of substances may best be separated through through fractional distillation

• sand and soil

• water and soil

• salt and sand

• water and alcohol

Multiple Choice

Dyes in water soluble markers may be separated by means of

• Simple distillation

• Crystallisation

• Chromatography

• Filtration

Multiple Choice

Look at the apparatus setup. It cannot be used to separate which of the following mixtures? 

• Marble chips from oil 
• Alcohol and water
• Chalk from sugar solution
• Sand and sea water

Multiple Choice

What method is used to obtain copper(II) sulfate crystals from its solution?

• Crystallisation

• Evaporation to dryness

• Paper chromatography

• Fractional distillation

Multiple Choice

What is the method suitable to obtain pure water from seawater.

• Simple distillation

• Fractional distillation

• Filtration

• Evaporation to dryness

Multiple Choice

Magdalena wants to separate the salt crystals from salt solution, what separation technique is best used for the set-up?

• Fractional distillation

• Simple distillation

• Filtration

• Evaporation

Multiple Choice

used to separate magnetic materials from nonmagnetic materials.

• MAGNETIC SEPARATION

• MANUAL PICKING

• DECANTATION

• SIEVING

• FILTERING

Multiple Choice

separates mixtures made of solid components large enough to pick out

• MAGNETIC SEPARATION

• MANUAL PICKING

• DECANTATION

• SIEVING

• FILTERING

Multiple Choice

separates components of mixture with different densities and immiscible liquids

• MAGNETIC SEPARATION

• MANUAL PICKING

• DECANTATION

• SIEVING

• FILTERING

Multiple Choice

What type of separation is used?

• MAGNETIC SEPARATION

• MANUAL PICKING

• DECANTATION

• SIEVING

• FILTERING

Multiple Choice

What type of separation is used?

• MAGNETIC SEPARATION

• MANUAL PICKING

• DECANTATION

• SIEVING

• FILTERING

Multiple Choice

How would you separate salt if mixed with sand?

• Pour water- Filtration-Decantation

• Pour water- Filtration-Evaporation

• Manual picking- Sieving- Filtration

Exit Ticket: Unlocking Separation Secrets

Open Ended

Quick Recall: Name three separation techniques and briefly describe how each works.

Open Ended

Application: A mixture of sand, salt, and water needs to be separated. What steps would you take to separate the components? Explain your reasoning.

Open Ended

Reflection: What was the most surprising or interesting thing you learned about separation techniques?

LEARNING TARGET

• I can identify different simple separation techniques for mixtures.

• I can describe how and when to use each technique.

• I can give examples of real-life applications of these techniques.

Poll

I can identify different simple separation techniques for mixtures.

• Complete Mastery – "I can confidently explain and apply different separation techniques to real-world scenarios!"

• Strong Understanding – "I understand most techniques well but need minor clarifications on a few concepts."

• Basic Understanding – "I grasp the general idea but still need more practice and examples."

• Limited Understanding – "I recognize some techniques but struggle with their applications."

• Needs More Support – "I feel lost and need further explanations to understand separation techniques better."

Poll

I can describe how and when to use each technique.

• Complete Mastery – "I can confidently explain and apply different separation techniques to real-world scenarios!"

• Strong Understanding – "I understand most techniques well but need minor clarifications on a few concepts."

• Basic Understanding – "I grasp the general idea but still need more practice and examples."

• Limited Understanding – "I recognize some techniques but struggle with their applications."

• Needs More Support – "I feel lost and need further explanations to understand separation techniques better."

Poll

I can give examples of real-life applications of these techniques.

• Complete Mastery – "I can confidently explain and apply different separation techniques to real-world scenarios!"

• Strong Understanding – "I understand most techniques well but need minor clarifications on a few concepts."

• Basic Understanding – "I grasp the general idea but still need more practice and examples."

• Limited Understanding – "I recognize some techniques but struggle with their applications."

• Needs More Support – "I feel lost and need further explanations to understand separation techniques better."