Making Hokey Pokey

Making Hokey Pokey

Ingredients:

100g sugar

1 Table of water

2 tablespoons of golden syrup

1 teaspoon of bicarbonate of soda

Method:

1. Put the ingredients except for the bicarbonate of soda into a saucepan and place on low heat.

2. Stir until all the sugar has dissolved. Raise the heat slightly so that it bubbles, and stir occasionally until you cannot feel any sugar at the bottom of the pan

3. Take off the heat.

4. Add bicarbonate of soda and stir!

5. Watch what happens-it should all forth up with bubbles in the pan

6. Pour out into your tinfoil sheet

7. Allow cooling.

Observation:
Here is what happened.

Testing for carbon dioxide gas and lime water

Testing for carbon dioxide gas

Experiment 1

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

Method:

1. Light your bunsen burner.
2. Add a 'Pea-sized' amount of the metal carbonate into one of the boilings tubes.
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 inserts the bung and delivery tube into the mouth of the boiling tube.
5. Holding the other boiling tube with your tongs, capture the gas produced as shown in the diagram.
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 in facing upright.
8. Insert the burning splint into the mouth of the test tube.

Observation: It took out the flame

Experiment 2

Method:

1. Light your bunsen burner
2. Add a 'Pea-sized' amount of the metal carbonate into one of the boilings tubes.
3. Place this boiling tube into a test tube rack. Ensure you have the bung and delivery tube ready.
4. Buuble gas into limewater

Observation: It becomes cloudy

Public art is a waste of time and money

Testing for the presence of oxygen

Testing for the presence of oxygen

Aim: To carry out a test for the presence of oxygen gas.

Method: 

1. Light your bunsen burner.
2. Add the magnesium oxide to the boiling tube and place it in your test tube rack.
3. Add 2mL of hydrogen peroxide.
4. Light a splint and let it burn for a while.
5. Blow the splint out and insert the glowing embers into the mouth of the boiling tube.

Observation: It relighted the splint make another flame

Making a metal Oxide

    Making a metal Oxide

Aim: To make a metal oxide and observe the difference in properties of the product compared to the reactant.

Method:
1. Light your bunsen burner.
2. Hold your piece of magnesium in the scissor tongs. Ensure you are holding onto the very tip of the magnesium.
3. Place the other end of the magnesium into the Bunsen flame ( at the top of the blue flame). 
4. When the magnesium begins to burn, do not directly at it, as the light emitted can permanently damage your eyes.

Observation: Before magnesium reacted with oxygen it was a shiny metal lustre during the reaction it was a bright white light.

Metals and Acids

Metals for Hydrogen Gas

Aim: To show that hydrogen gas is produced when a metal reacts with acid.

Method: 

1. Light your bunsen burner.
2. Add your sample of metal to your test tube. Add 2 mL of acid.
3. Carefully invert the boiling tube above the test tube containing the metal and acid (as shown in the diagram below).
4. Hold the test tubes together for a few minutes, allowing time for the inverted boiling tube to fill with gas.
5. When you think the tube is full, Your lab partner should light a wooden splint.
6. Carefully, but quickly, tilt the boiling tube full of gas upwards and insert the burning splint into the mouth of the test tube.

Observation:  It will make a loud popping sound.

Plastic bags

2018 Technology Metal

Technology

Our first project in Technology Metal was F shapes and drill gages.
From the start of the year until now these two projects are our first project, Half of the class have done the drill gage first and then they how done the Fshapes and some people have done the F shape first and the drill gage because we're too many people. This year I have learnt how to use Vernier, Micrometer, Ruler, oil dipping, using the drills, marking out, scriber and etc.
I'm happy because finally we have finished this work and I'm excited because we're gonna start a new project.

Methos for F shapes

• Two pieces of ferrous steel are supplied
• Clean both pieces with emery paper and add engineering marking fluid
• Mark out one piece exactly to the given measurements with a scriber
• Use the correct procedure for cutting out 
• Now place this over the B.M.S. and mark out and cut 
• File to fit
• Finishing techniques

The most thing I liked about this project was oil digging and drilling

The most thing I hated was cutting and cleaning it.

This is what I did from the start of the year until now.

Gaming

Technology is good and bad

Making salts

Making salts

Aim: To produce sodium chloride salt by carrying out a neutralisation reacting.

Method:

1. Using the measuring cylinder measure 10 mL of HCl and pour it into your 50mL beaker. Add dilute NaOH a few drops at a time while stirring with the glass rod.
2. Every 10-15 drops stop adding the NaOH and use the glass stirring rod to transfer a drop of the solution to a spotting tile. Test its pH using Universal indicator.
3. Keep adding NaOH and testing the solution by repeating step 2. As you get closer to neutral you may need to test the solution after every drop.
4. Pour the neutral into an evaporating basin and evaporate the water out of the solution using the equipment set up shown above.

Neutralisation

Neutralisation

Aim: To observe a neutralisation reaction.

Equipment: A test tube, test tube rack, 1mol per liter sodium carbonate, 1mol per liter hydrochloric acid, dropper or dropper bottle, Universal indicator solution.

method: 

1. Add approximately 1-2 mL of sodium carbonate and place the test tube into the test tube rack. Add 3-5 drops of Universal indicator solution

2. Using a dropper bottle, add hydrochloric acid drop by drop. be careful because adding even a small amount of extra acid can mean you'll miss the neutralisation point.

Observations
The only change that does produce something different during the neutralisation is the reaction between hydrogen ions and hydroxide ions, which produces water molecules. This is the ionic equation that represents the neutralisation reaction between any acid and any alkali.
The pH of 1-3 is red and it's strong Acid, from 4-5 is orange and it's weak and 6 is yellow and its very very slightly acidic and 7-8 is green and it's neutral and 9-11 is blue and it's slightly basic and from 12-14 is purple and it's strongly acidic.

School uniform should be mandatory.

School uniform should be mandatory.

I like wearing school uniform because

•  it represents your school
•  everyone knows what school do you go to.
• everyone is the same like you cant see who is poor or rich

I don't like wearing school uniform because

• you can wear whatever you like 
• you look like other students
• you can be different to others
• it looks ugly
• it's not comfortable

Testing pH

Testing pH

Aim: To test the pH of a range of household chemicals.

Equipment: A variety of household chemicals, spotting tile, red litmus paper, blue litmus paper, universal indicator solution, safety glasses.

Method: 

1. Add a few drops of each chemical to a spot on your spotting tile. If a substance is solid or powdered you will need to mix it with a few drops of water before testing it.
2.  Test the chemicals with litmus papers.
3.  Test each chemical with a few drops of universal indicator.

Results:

Chemical being tested	Colour in blue litmus	Colour in blue litmus	Colour in Universal indicator
Harpic	red	red	yellow
Easy off BAM	blue	blue	black
Dettol	red	red	yellow
Pledge	blue	red	yellow
Pledge clean and dust	red	red	orange