Seperating a mixture using chromatography

Aim:
To seperate the different pigments in inks or dyes using paper chromatography.

Equipment:

• Inks from a ballpoint pen, marker pen, or food colouring.
• 250mL beaker
• Filter paper
• Scissors

Method:

1. Cut a strip of filter paper that is long enough to sit on the bottom of your beaker and still curl over the edge on the top of the beaker.
2. Rule a line in pencil approximately 2cm from the bottom of your filter strip.
3. Draw a circle a few mm above the ruled line in ballpoint pen, maker pen, or food colouring (i used marker pen).
4. Fill your beaker with water until it reaches the depth of the marked line on your strip.
5. Place the filter strip in the beaker and curl the filter poking out over the beaer so it doesnt slip in. (if the solution touches the ink the expirement will not work).
6. Record what happens...

 

The ink would've travelled further but i was in a rush to a finish so i had to stop.

Results:

The ink had a mix of a lot of red and a small amount of purple.

Separating mixtures

Aim:
To separate a solution from a precipitate (a precipitate is a solid that forms in a liquid)


Equipment:

• Lead Nitrate
• Potassium Iodide
• 10mL measuring cylinder
• conical flask
• strirring rod
• 250mL beaker
• funnel
• filter paper

Method:

1. Measure 10mL Potassium Iodide into a measuring cylinder and pour into a beaker. Wash measuring cylinder with water.
2. Measure 10mL Lead Nitrate into a measuring cylinder and pour into the beaker. Wash measuring cylinder with water.
3. Fold a piece of filter paper and put it into a funnel.
4. Place the funnel in the mouth of a conical flask.
5. Pour the mixture into the funnel.
6. Observe.

Growing crystals

Aim:
I want to find out how to make crystals form in a supersaturated solution.

Equipment:

• A supersaturated solution of Sodium Acetate
• Bunsen burner
• Heat Mat
• Test tube
• Test tube Tongs
• Funnel
• Filter paper
• Small beaker

Method:

1. Get a boiling tube with crystallized super-saturated solution.
2. Carefully heat the boiling tube over the bunsen burner to the crystals dissolve (make sure your tube is facing the wall at a 45-degre angle. 

3. Once all the crystals have dissolved place the test tube in a beaker full of cold water (the tube will be too hot to continue the experiment).

4. Once it is cooled down drop one crystal seed into the solution and watch all the crystals form.

Dilution

Aim:
To make a dilution series to investigate concentration.

Equipment:

1. A potassium permanganate crystal.
2. Six test tubes.
3. A plastic transfer pipette.
4. A test tube rack
5. 10mL measuring cylinder.

Method:

1. Place the six test tubes in a test tube rack.
2. Using the measuring cylinder, fill test tube 1 with 10 mL of water. Fill the remaining test tubes with 5mL of water.
3. Add a spatula of potassium permanganate to the first (10mL) test tube of water.
4. Take 1mL from the first tube and add it to the next tube.
5. Take 1mL from the second test tube and add it to the next tube.
6. Take 1mL from the third test tube and add it to the next tube.
7. Take 1mL from the fourth test tube and add it to the next tube.
8. Take 1mL from the fifth test tube and add it to the last tube.

Discussion:

The first test tube was the darkest and carried on through to the sixth test tube getting lighter and lighter.

Investigating solubility

Aim:
I want to investigate the solubility of calcium chloride and magnesium oxide to see which is more soluble in water.

Equipment:

• calcium chloride
• magnesium oxide
• 100mL measuring cylinder
• stirring rod
• 250mL beaker
• spatula

Method:

1. fill a beaker with 100mL of tap water.
2. get your spatula and scoop some calcium chloride into the beaker.
3. stir until the solution is dissolved.
4. Repeat steps 2 and 3 until its insoluble (keep data of how many scoops you applied).
5. Repeat experiment but with magnesium oxide.

Results:

I was able to get 12 scoops of calcium chloride until it was insoluble. Magnesium oxide is insoluble

bouncing balls

Aim: I want to investigate how high the ball can bounce a from different heights

Hypothesis: I think the higher you drop the ball then the higher it bounces.

Method:
Equipment:
ball,  stand, ruler, something to record on(ex, phone, laptop), paper or laptop to write results

Step 1.get equipment
step 2.Put the ruler on a stand so it stands up straight.
Step 3.record the drop from 1 meter and record it on slow-mo.
Step 4. drop the ball 3 times to make sure that your results are correct.
step 5.drop the ball from different heights

Discussion:
The higher you drop a ball the higher it bounces


control variables:
*the type of ball
*what it bounces on

Dependent variable
*the hight the ball bounce after being dropped from different heights

Independent  variables
*The heights the balls being dropped from.