unit 1 - separation techniques

• Scheikunde
• Middelbare school
• vwo
• Leerjaar 3

Programme Today

Chemistry online - why?

While you wait:
make sure to have the table on A3 paper ready near to you.

Prepare questions about homework

Discuss homework

Separation Techniques Activity

Homework for today

1. As preparation for the next lesson review unit 1.1. – 1.4 (edition 2) using the videos in Itslearning and/or textbook.

2. Worksheet Elements Compounds Mixtures with answer key (if not done during the lesson)

3. Chemical Calculations Week 2 - hand in in itslearning if you have been requested to do so (see feedback in SomToday period 2) and/or if you want to show motivation and/or if you want feedback.

4. Make a list of the purification techniques you find in unit 1.

Prepare a large A3 papier with a table of 7 x 11 columns (see attachment) for the next lesson. Read already the assignment in the attachment.

What resources did you use to study?
(Let's try out the new poll function)

Textbook

Videos

Workbook

Textbook Workbook

TextbookVideos

WorkbookVideos

TextbookVideosWorkbook

Questions about the homework?
Add unit number (1.1 - 1.4) or page

Does the model below represent a mixture or a pure substance?Explain your answer using the words molecules and atoms.

Answer: mixture

Mixtures contain multiple molecules.

In this case elements and compounds.

Each molecule can contain one or more types of atoms.

Molecule with one type: element.

Molecule with more types: compound.

Also a pure substance can either be elements or compounds.

Objective of separation

Substances are separated.

Mixtures are purified.

Using properties: density, boiling point, solubility, and others.

Separation Techniques activity

Subject objective: you will learn about the separation techniques.

Languague objective: you will learn to describe seperation techniques in English and in Dutch.

We will work in 3 rounds to fill in the table.

Round 1: per technique each assignment (see next slides with example)

Round 2: for each assignment all the techniques

Round 3-4: fill in as much as possible of the table.

Sources: textboo, videos in itslearning, internet

Example: follows for Sieving

When done: fill in rest of the table

Description: Briefly explain how this separation technique works.

Dutch:
look up the Dutch word.
(everybody)

Zeven

By shaking a sieve
particles smaller than
the mesh size
fall through the sieve leaving larger particles on the sieve

Visual representation: look for a diagram explaining the separation technique

Mixture: Which kind of mixture can you separate with this separation technique?

Property: What physcial or chemical property is the separation based on?

Keywords: what keywords are important in this separation technique

Example from daily life: Look for a situation from daily life in which you come across this separation technique.

Sand pit

Separating flour in  mill
Gravel of all sizes at the DIY store

sieve
mesh size

Round 1

Per room fill in
one or two horizontal lines
(7 rooms)

Round 2

Per room fill in
one vertical line

room 1.          2.      3.      4.    5.    6. 

Zeven

Filtreren

Bezinken en afschenken

Centrifugeren

Indampen

Extraheren

Adsorberen

Destilleren

(Papier)chromotografie

Round 3 and 4
(if enough time)

In random groups of 3 fill in as much as possible of the table.

What did you think of this activity?

😒🙁😐🙂😃

In which would you like to complete the table and check your understanding?

By listening and looking at a 45 minute presentation (by Mrs Hainebach on her YouTube channel)

By listening and looking at a online live presentation by Mrs Hainebach

By looking at You Tube videos SELECTED by Mrs Hainebach --> itslearning

By studying the textbook and doing summary + workbook questions

Programme Today

To start 4 techniques briefly explained, 9 MC-questions,
then ±45-60 min independent work.

By the end of this lesson you can:

- name the ten separation techniques and describe them

- give for each separation technique the property it is based on

- determine for a mixture which separation technique is best

- draw a diagram representing each separation technique

Adsorption

Evaporation

Filtration

Distillation

Which separation technique should you use to separate water and alcohol? You want to keep both.

1. Adsorption
2. Evaporation
3. Filtration
4. Distillation

Which purification technique uses active carbon? It's often used when camping in the wild.

1. Adsorption
2. Evaporation
3. Filtration
4. Distillation

Which separation technique should one use, if one wants to recuperate the sugar from a sugar solution.

1. Adsorption
2. Evaporation
3. Filtration
4. Distillation

What do we call a mixture of soluble substances and water?

1. Suspension
2. Solution
3. Emulsion
4. Colloid

Which separation technique should one use to separate sand and water?

1. Filtration
2. Evaporation
3. Distillation
4. Adsorption

What do we call a mixture of insoluble substances and water?

1. Suspension
2. Solution
3. Emulsion
4. Colloid

True or False.
The substance staying behind in the filterpaper when doing a filtration is called the residue.

1. False
2. True

Which description fits best with sedimentation?

1. Use. a filterpaper to filter the suspension. The insoluble substances will stay behind.
2. One shakes the suspension to separate the insoluble substances from the water.
3. One leaves a suspension to set. The insoluble substances will sink to the bottom.

Which separation technique(s) would one use to make drinking (potable) water from sea water?

In todays lesson you may choose from the following activities:

1. Follow live presentation by Mrs Hainebach
2. Watch videos: Itslearning > unit 1 > videos (selection from youtube)
3. Watch Presentation done by Mrs Hainebach > Part 1 and Part 2 on Mrs Hainebach Youtube Channel (links see SomToday)
4. Study from Textbook
5. Do summary questions and workbook questions

Next lesson we will do a formative assessment on Quizizz.

Indampen(vaste stof = residu)

het verschil berust op kookpunt

Destileren (residu, destilaat) =>het kookpunt van alcohol bijvoorbeeld 78 graad Celsius en het kookpunt van water 100 graad Celsius

Destileren (residu, destilaat) =>het kookpunt van alcohol bijvoorbeeld 78 graad Celsius en het kookpunt van water 100 graad Celsius

Destileren (residu, destilaat) =>het kookpunt van alcohol bijvoorbeeld 78 graad Celsius en het kookpunt van water 100 graad Celsius

verschil berust op kookpunt

Filtreren  

Bezinken 

Filtreren  

Bezinken 

verschil berust op grootte van de deeltjes 

Programme Today

Revise and evaluate unit 1 (Quizizz).

Starter exercise: go to the website 
https://askmichellechemistry.blogspot.com/p/glossary.html

You will be assigned several letters.

Check the words with those letters.

If they fit with unit 1, copy paste the word and the definition into the chat of Zoom.

With the selected words we will do an activity this or a next lesson.

Which activity did you do mainly to complete your table with separation techniques?

By listening and looking at a video (by Mrs Hainebach)

By looking at You Tube videos SELECTED by Mrs Hainebach

By studying the textbook

Do summary questions and workbook questions

Questions about the homework?

Questions after doing the quiz?