My boomerang

Boomerangs 

What was the purpose of the activity? 

The purpose of this activity was to get a better understanding of how the aboriginal culture used boomerangs.  We designed our own boomerangs with the inspiration of the artwork aboriginal people used. Painting dots, line, animals, etc. We did this to get an idea of how a boomerang might have been designed and used. 

What is the meaning of my boomerang?

My boomerang doesn't really have a specific meaning to me. I took some symbolic aboriginal painting designs and applied it to my boomerang. The tree represents the wood the aboriginal used to make the returning boomerang, traditionally boomerangs were made from Mulga or Black Wattle. The brown background represents the colour earth, healing and the wood. The light green represents growth and peace. I added the white lines and dots as inspiration from an aboriginal boomerang.  

What went well when painting my boomerang? 

At first, I didn't know what to paint. I painted one side of me boomerang and I didn't end up liking how it looked. So I started again on the other side. My boomerang turned out alright, I was happy with what I painting. The painting was really fun and it was cool to see everyone's designs. 

 

English

A message I take from this scene is having unrealistic hope. The mirage created the illusion that the water wasn't rushing through the gates, but in reality, it was. Many are dying for water all for it to be wasted.

English

 A message I take form this scene you may think you know someone but you don't. Based on how they act, dress, and walk does not define a person. You misinterpreted the situation thinking that they live a simple life when in reality they face struggles, problems, etc like everyone else. 

Testing for Carbon Dioxide Gas

Aim: To show that carbon dioxide gas is produced when a metal carbonate reacts with acid. 

Equipment: Two boiling tubes, delivery tube and bung, Bunsen burner, test tube rack, wooden splint, a bottle of acid, small amount of metal carbonate, test tube tongs, safety glasses. 

Method: 1. Light your Bunsen burner.

2. Add a 'pea-sized' amount of the metal carbonate into one of the rubes.

3. Place this boiling tube into a test tube rack. Ensure you have the bung and delivery tube ready. 

4. Add 5mL of acid to the boiling tube and quickly insert the bung and delivery tube into the mouth of the boiling tube. 

5. Holding the other boiling tube with your lungs, capture the gas produced as shown in the diagram below. 

6. When you think the tube is full, your lab partner should light a wooden splint.

7. Carefully remove the boiling tube from under the delivery tube, taking care to keep it facing upright. 

8. Insert the burning splint into the mouth of the test tube. 

Result

Test 1 showed that the splint going out in an instance when I added to the test tube. It went out due to no oxygen within the space.

Lime water result

Test 2 with lime water showed that the liquid became cloudier and foggier.

Discussions

While doing the experiment we watched a chemical reaction occur.  

Calcium carbonate + Hydrochloric acid ---> Calcium  chloride + carbon dioide + water 

Japanese - Self Intro

                                           Here is my self into for Japanese’s  in Japanese.

Making salt

Aim:

To produce copper sulfate salt by reacting copper oxide with an acid. 

Equipment:

Copper oxide powder
Dilute (o.5 mol L-1) sulfuric acid
50 ml measuring cylinder
two 100 mL beaker
Bunsen burner
Tripod
Gauze mat
Funnel
Filter paper
Thermometer
Spatula
Evaporating basin
Stirring rod

Method:

1. Add 20ml of sulfuric acid to a 100 ml beaker. Heat the acid until it reaches 70 degrees Celsius. Turn off your Bunsen burner.  
2. Once heated, use a spatula to add pea-sized portions of copper oxide to the beaker. Stir the mixture for 30 seconds.
3. Repeat step 2 until no more will dissolve. Allow the beaker to cool. 
4. Fold the filter paper and place it in the funnel. Place the filter funnel into the second beaker. 
5. Make sure the beaker is cool enough to hold at the top. The contents should still be hot. You may need your teacher to complete this step. 
6. Gently swirl the contents of the beaker to mix, and then pour into the filter paper in the funnel. Allow to filter through. 
7. Rinse the beaker you used to heat the mixture previously, and place it back on top of your tripod filled with 50-60 mL of water
8. Place the evaporating basin on top of the beaker and carefully pour some of the solutions from the beaker into the evaporating basin. 
9. Gently heat the beaker until the solution in the evaporating basin had reduced by half.
10. Leave the evaporating basin to cool. Once cool, move the evaporating basin to a warm place where it will not be disturbed (i.e. a window-sill)  and observe over the next few days. Blue copper sulfate crystals should form. 

We made a copper sulfate salt. We made this by using acid to react with copper oxide. We evaporated the solution and was left with blue crystals. 

Here are my crystals

This experiment was very fun. Producing copper sulfate by reacting copper oxide with acid was interesting, it worked really well. I think my crystals turned out great. 

Making Indicators

Making Indicators: Cabbage  

Aim: 

To make acid-base indicators using everyday substance. 

Equipment:

Red cabbage, a beaker, water, tripod, Bunsen burner, gauze mat, 1.0 mol L-1 HCI and 1.0 mal L-1 NaOH.

Method: 

Chop the cabbage into small pieces until you have enough to fill 2 cups.

Place the cabbage in a large beaker and add water to cover the cabbage. 

Boil over a Bunsen burner for at least ten minutes for the colour to leach out of the cabbage.

Filter out the plant material to obtain a red-purple-bluish coloured liquid. This liquid is at about pH 7. (The exact colour you get depends on the pH of the water.) 

Place in a small beaker and leave to one side.



Here are my results 

When I added HCI (Acid) to cabbage it turned red. When I added NaOH (Alkali) it turned green.

The other indicators here were made by my other classmates.

When HCI (Acid) was added to Tea it turned yellow. When NaOH (Alkali) was added to tea it turned Yellow

When HCI (Acid) was added to Tumeric it turned yellow. When NaOH (Alkali) was added to Turmeric it turned red.

When HCI (Acid) was added to Cranberry it turned a pink-red colour. When NaOH (alkali was added to Cranberry It turned green.

When HCI (Acid) was added to beetroot it turned red. When NaOH (alkali was added to beetroot it turned yellow.

Cabbage boiling 

All indicators with HCI(acid) and NaOH (alkali)

Conclusion:

We successfully made acid-base indicators using everyday substances. It wasn't hard at all. I think the Cabbage worked the best when adding acid and base because of the colours changes that happen.