Dissolving Solution

Aim

To investigate the solubility of Calcium Chloride and Magnesium Oxide to see which is the most soluble in water.

Equipment

-A 250ml Beaker

-100ml Measuring Cylinder

-Calcium Chloride

-Magnesium Oxide

-A Stirring Rod

-A Spatula

Method

-Fill the Beaker with 100ml of tap water

-Add a bit Calcium Chloride by using a Spatula

-Stir the solution until all of the Calcium Chloride has dissolved

-Repeat steps 2 and 3 until no more Calcium Chloride will dissolve into the solution

-Records with how many Calcium Chloride you added with the spatula.
-Repeats the experiment, with Magnesium Oxide

Results

Solute

-Calcium Chloride-2

-Magnesium Oxide-6

Discussion 

-It took really long to dissolve Calcium Chloride.

-It took less time to dissolve magnesium Oxide and more to dissolve.

Chromatography-Separating a Mixture of Coloured Compounds

Aim

To separate the different pigments in inks or dyes using paper chromatography.

Equipment

-Inks (From Ballpoint pens)

-Marker Pens or Food Colouring 

-250 ml Beaker

-Strip of Filter Paper 

-Scissors 

-Adhesive Tape

-Pencil or Ice-Block Stick

Method

-Cut a strip of filter paper that is long enough to reach the bottom of your beaker and able to wrap around your pencil or ice-block stick.

-Rule a line in pencil approximately 2 cm from the bottom of your piece of paper.

-Fill your beaker with enough chromatography solution to fill your beaker to a depth of 1 cm.

-Place a dot of ink above the ruled line on your filter paper. You need to produce a concentrated dot of ink so repeated applications may be necessary.

-Suspend the strip of Paper from the pencil or stick. You may need to use adhesive tape to stop it from falling into the solution.

-Wai to see what happens. It is important that you do not disturb the beaker. If the solution comes in contact with the ink dot, the ink will run down into the solution, rather than move up the filter paper.

Discussion

-The water ran up the filter paper causing the ink to run up as well.

Outline the origin of the term chromatography

Chromatography (Chroma - Greek for 'colour' and the word biography meaning 'words' or 'pictures')

Describe the type of mixtures that chromatography can separate

Inks and Dyes.

Explain why the pigments separate

The pigments separate because they have different solubilities in a solvent.

Growing Crystals

Aim

I want to find out how to make crystals from a supersaturated solution

Equipment

-A super solution of Sodium Acetate

-A seed crystal of Sodium Acetate

-Bunsen burner

-Boiling Tube

-Test Tube Tongs

-Heat Mat

-Funnel

-Filter Paper

-Small Beaker

Method

-Fold the Filter paper. and put it in the funnel (The teacher will show you)
-Put the funnel on either the Beaker or the Test tube.
-Put in the solution given by the teacher.
- Wait for it until it reacher 2/3 of the Test Tube/Beaker
-Set up the Bunsen Burner
-Heat up the Solution
-Take it in and out
-Once down cool it down with water for 5 minutes
-After that take it and drop a crystal

Results

Discussion

-After boiling my solution and cooling it down, I put some crystal in it exploded into a crystal.
-