Investigating State Changes

Aim: To observe water as it changes state from solid to liquid and then to a gas

Method:
1. collect enough ice so that your beaker is half full and place the thermometer into it while you set up the
 rest of the equipment.

2. Set up the retort stand and clamp alongside the tripod and gauze mat.

3. place the beaker of ice on the gauze mat and gently clamp the thermometer so that it is held upright
 and the scale is easy to see. 
The bottom of your thermometer should be low enough to still be covered by water when the ice melts,
 but not touching the bottom of the beaker.

4. record the initial thermometer of the ice in the data table below.

5. Light the Bunsen burner and start timing with the stopwatch.

6. measure and record the thermometer every minute.

7.continue measuring and recording the thermometer until the water has been boiling for 2-3 minutes.

Making a dilution series

Aim: To make a dilution series to investigate the concentration

Equipment: A potassium permanganate crystal, six large test tubes, tweezers, a plastic transfer pipette, a test tube rack, 10ml measuring cylinder

Method:

1. Place the six test tubes in a test rack. Label the rack with numbers 1-6

2.  Using the measuring cylinder, fill the test tube 1 with 10 ml of water. Fill the remaining test tubes with 5ml of water

3. Using your tweezers, add a single crystal of potassium permanganate to test tube 1

4. Gently shake the test tube until the crystal has dissolved

5. Using the transfer pipette, carefully remove exactly 5ml from the test tube 1 and pour in into test tube 2

6. Rinse the transfer pipette again and repeat the transfer process for test tube 4, 5 and 6

 Discussion:  We put a tiny bit of solute into solvent to make a solution and to make a dilution series.

Chromatography Science Experiment

Aim: To separate the different pigments in ink or dyes using paper chromatography

Method: 1. Cut a strip of filter paper that is long enough to reach the bottom of your beaker.
2. Fill your beaker with enough chromatography solution to fill you beaker to a depth of 10cm
3. Place a dot of ink above the ruled line on your paper. you need to produce a concentrated dot of ink so repeated applications may be necessary.
4. Wait to see what happens. It is important that you do not disturb the beaker. If the solution come in contact with the ink dot, the ink will run down into the solution rather than move up the filter paper

Results: They turned out very well some of mine failed because the ink got into the solution and different colours I tried out did not do as well as other colours.

Discussion: When the solute is to low and the solvent is to high  it wont work. The water will soaked the paper an it wont turn out the way you want it to.

If the solute and solvent / solution work well you could try different colours different patterns eg

Science Experiment (Crystals)

19 March 2019

Aim: To separate a solute from a solvent in a solution using evaporating

Method: 

1. Set up the Bunsen burner, tripod and gauze mat. Dont place the Bunsen burner under the tripod yet.

2. Add approximately 50ml of hot water to your beaker and place it on top of the tripod, on the gauze mat.

3. Add enough copper sulfate solution to quarter fill the evaporating basin.

4. Carefully place the evaporating basin on top of the beaker.

5. Light you Bunsen burner.Open the air hole and gently push the Bunsen burner under the tripod.

6.Heat the solution until most of the solvent has been evaporated and crystals of solute are forming

7. Turn off your Bunsen burner

Distillation Experiment

Aim: To separate a solute from a solvent in a solution using distillation 

Method: 

1. Set the equipment shown in the diagram

2.  Add approximately 50ml of salt water to your conical flask

3. Light your Bunsen Burner. Open the air hole and gently push the Bunsen burner under then tripod

4. Heat the solution until most of the solvent ha been evaporate.Turn  off the Bunsen burner.

=  We were using coca cola instead of salt water.

 Discussion: The coca cola is mixed with salt and water which is a solution, Then we would heat that up, then the gas will go down the delivery tube into the beaker with ice then it will condense = (The gas going back to liquid.)

(This is all a distillation)

Science

 19 February 2019 

Science Experiment

Aim

Measuring the tennis ball by different heights you drop it from

Hypothesis

The higher you drop the ball the higher it will bounce

Method

Someones going to hold the ruler as another person is going to drop the tennis ball from different heights as recording the measurement also repeating it 3 times each height

Results

1m - 32, 19, 21

2m - 34, 29, 27

3m - 41, 39, 37

54cm - 21, 24, 26

Discussion

When we dropped it at 1 metre the bounce back was 32cm when we dropped it at 2 metre the bounce back was 34cm.

When we dropped it at 3 metre the bounce back was 41cm

The we dropped it at 54 cm then came back to 26cm 

Conclusion 

Our aim was 

(Measuring the tennis ball by different heights you drop it from)

These results came back to my hypothesis

 (The higher you drop the ball the higher it will bounce)

 !WHICH IS CORRECT!

Our Experiment / Hot & Cold

For the past 2 weeks my friend Paige and I did a experiment. We called it Hot & Cold because it was to do with hot water and cold water. Things we need for the experiment

1. Blue and Red dye

2. 2 Jars

3. Skewer

4. Scissors

5. Dish

6. A Plastic card

First you fill up the jars, one hot and one cold. You put three drops of blue food colouring in the cold water, and then you put three drops of rose pink/red food colouring in the hot water by using the skewer. After that you put one on/in the dish and then the one that’s going on top, put the plastic card on it and quickly flip it over (water shouldn’t come out if you’ve done it right). When you’ve done that, put it on top of the other jar, and slowly slide the plastic card out. And you’re done!

So the first time you do it you have to put the cold water on top of the hot water. The we have to change it around so the hot water is on top of the cold water.

When the hot water is on top of the cold water it doesn’t mix. We think that it’s because the steam from the hot water is acting like a barrier so it doesn’t go through.

But when the cold water is on top of the hot water it mixes because there isn’t any steam barrier to stop it.

Our experiment involves Air Resistance because the steam is air. Also Geothermal energy because of the hot water and Balanced Forces because the hot and cold water are leveled. The Atua would be Ruaumoko.

Heres Our Video
Watch This One First The This One