Today's work!

-----Assignment assigned by Mr Elijah Ong-----(Mr Ong's blog)

So far I have learned about :

• Measurements
• Density
• Acids and Alkalis
• Atoms and molecules
• Elements, compound and mixture
• Filtration

As stated in his blog , I need to choose any of the two topics above and find the following materials to support my learning. 

1. Scientific articles
2. Videos on YouTube
3. Ppt that other people have created.
4. PDF notes that other people have created.

Then,

I need to list down at least 5 things that I learnt from the materials ( 5 each topic ) . 

I also need to list down things I don't really understand and would like to find out more.

I decided to choose these topics ;

Atoms and Molecules

1. Scientific Articles

There are alot of articles that you could find on the internet. 

Some examples are :

• Engineering functional structures with single atoms and molecules
• Unpeeling atoms and molecules from the inside out
• Toward real time observation of electron dynamics in atoms and molecules 
• New technique excites atoms and molecules using pulsed laser
• EUROCORES conference gives cold quantum matter a European twist
• ((You can see more articles at the following website. You can also read the articles. http://esciencenews.com/dictionary/atoms.and.molecules))

2. YouTube video

3. PowerPoint that other people have created  / 
4. PDF notes that other people have created .

Click here to see the PowerPoint Slides.

Elements,compounds and mixtures

1. Scientific Articles

Click here to see a video about Elemnts, Compounds and Mixtures

2. YouTube video

3. PowerPoint that other people have created  / 
4. PDF notes that other people have created .
Click here to see the PowerPoint Slides



________________________(: THANK YOU :)____________________________

The experiment .

FILTRATION PROCESS

I did this experiment with my partner, Arina. My teacher asked us to try out how to separate salt and sugar by ourselves. I read about filtration ( a process to to filter ) through Google and saw a video on YouTube about Filtration. 

This is the video. Check it out !

Photos taken throughout the experiment :

This is the materials used. 

It's excluding the Bunsen Burner set-up.

I have more photos but they are all kind of the same in the YouTube video.

Reflections

REFLECTIONS ON HELIUM ATOM

3 thing I've learnt from this project :
- Helium atom has 2 electrons, 2 protons and 2 neutrons.
- Helium is in the 8th group.
- Helium is a noble gas.

2 things I would like to improve on :
- What materials used
- The way I labelled the parts

1 thing I would like to learn :
- How to make a more 3 Dimensional model

Videos from YouTube

You could also watch these videos from YouTube to understand more about Chromatography and Types of Mixtures. There are also the ones about Filtration. Just search it on YouTube. YouTube is the best place to find videos.

Chapter 7 MindMap : Separation of mixtures

SEPARATION OF MIXTURES

This mindmap shows a lot of stuff . Just give it a click to see the full screen . Thank you xD

Chapter 6 MindMaps : Elements , Compounds & Mixtures

ELEMENTS, COMPOUNDS & MIXTURES 

This mindmap tells about what elements, compounds and mixtures are and the properties and examples . 

Ink Chromatography

Ink Chromography

How to we separate a drop of ink ?

Use the process of paper chromatography to separate the pigments in various markers and then determine the R_f value for each color on your chromatogram.

Materials needed : 

1. Plastic vials
2. Paper clips 
3. Markers in assorted colors 
4. Chromatography paper 
5. Scissors 
6. Pencil

Procedure :

1. Obtain chromatography vials and chromatography strips, and different color markers so that each person in the group will have two chromatograms.
2. Cut one end of the chromatography strip to a point. The bottom of the point will mark the starting point for movement of the solvent (H₂O).
3. About 2.0 centimeters from the bottom of the strip, draw a faint horizontal line with pencil. This will mark the starting point for measuring the migration distance of each color.
4. Using a different color marker for each strip, drop a dot of ink on the center of the horizontal pencil line.  Let this dry a moment & then add more ink to the dot.
5. Add a small amount of water to the bottom of the chromatography chamber. (The ink dot should be ABOVE the surface of the water.)
6. Straighten a paper clip and poke a hole through the top of your chromatography strip
7. Use the paper clip to hang the strip in your chamber. (The straighten paper clip will lay across the top of the chamber.)
8. MAKE SURE THE TIP OF THE STRIP BUT NOT THE INK IS IMMERSED IN THE WATER!
9. Notice the separation of the ink as both the solvent and ink travel up the chromatography strip.
10. Once the solvent front has neared the top of the strip, remove the strip from the chamber and lay it on a piece of paper towel.
11. Immediately mark the solvent front with a faint pencil line.
12. Immediately mark the leading edge of each color with an "x".
13. Measure, in millimeters, the distance the solvent migrated from the tip of the strip to your solvent front pencil line.
14. Measure, in millimeters, the distance each color migrated from the point of origin (pencil line where the ink dot was placed) to the leading edge of the color (marked with an "x".
15. Record all data in Data table 1.
16. Calculate and record the R_f value for each color using the formula below.

R_f = distance traveled by the compound / distance traveled by the solven

Adopted from : http://www.biologyjunction.com/ink_chromatography.htm


I tried out this experiment at my school science lab . I've uploaded them onto this blog . Check it out people ! Thanks .