Science - Hydrogen gas & Magnesium Oxide Experiment

Hydrogen Gas Experiment:

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

Equipment: A test tube, a boiling tube, bunsen burner, wooden splint, a bottle of acid, a peice of metal, safety glasses

Method: 1. Light your bunsen burner

                2. Add your sample of metal to your test tube. Add 2mL of acid.

                3. Carefully invert the boiling tube above the test tube containing the metal and acid.

                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.

Results: When the acid went with the magnesium it fizzed up, then warmed up, next we lit a wooden splint and put it into the tube a big pop formed almost making us students deaf.

Conclusion: When the hydrogen gas ignited It reacted with the oxygen in the air which released energy

Magnesium Oxide Experiment:

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

Equipment - A piece of magnesium, bunsen burner, safety glasses, metal scissor tongs.

Method - 1. Light your bunsen burner.

                2. Hold your peice 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 burner (at the top of the blue flame).

                4. When the magnesium begins to burn, do not look directly at it, as the light emitted can                                 permanently damage your eyes. 

Results: The magnesium ribbon burns with a very bright white light. A white smoke is produced as it burns. When the reaction is over a white powdery substance remains.

Conclusion: The white light is formed because the magnesium reacts with the oxygen to produce magnesium oxide releasing energy.

Science - Mixture and Dissolving experiment

Today in science we did an experiment to see how long it takes for something to desolve in water. First when we got into the science class we did a pre-test on quizlet about mixing and separating for our experiment that we did afterwards. When we started the experiment this is what we had to do.

First we got the equipment ready before we did the experiment.

Equipment:

- A big beaker

- Spatula

- Sugar

- Water

Aim: To find out how long it takes for the sugar to desolve in different situations

Then we did the experiment.

This experiment has four parts to it so you can test the speed that it takes to dissolve and to see the dissolving rate.

Method: 

1. Put 50mls of cold water into the big beaker and put one spatula of sugar into the beaker and start a timer and stir consistently until the sugar dissolves

2. Put 50mls of hot water into the big beaker and put one spatula of sugar into the beaker and start a timer and stir consistently until the sugar dissolves

3. Put 50mls of cold water into the big beaker and put one spatula of sugar into the beaker and start a timer then wait until it dissolves (DO NOT STIR)

4. Put 50mls of hot water into the big beaker and put one spatula of sugar into the beaker and start a timer then wait until it dissolves (DO NOT STIR)

Results: These times are the total and average times for all the groups in our class.

1. Total: 274sec Average: 54sec

2. Total: 119sec Average: 29.75sec

3. Total: 381sec Average: 76.2sec

4. Total: 819sec Average: 163.8sec

Our results:

1. For the first experiment we got 59sec

2. For the second experiment we got 25sec

3. For the third experiment we got 90sec

4. For the fourth experiment we got 360sec

Discussion:

Our results made sense because the one that was the fastest combined two things that speed up the time of dissolving. This is because when you add heat and stir it add speed to the matter and it starts to dissolve.

The results also show that the one with nothing that affects the time it takes to dissolve will end up as the slowest.

We started with sugar and water and at the end we ended up with sugarwater

Here are the photos of the equipment we used.

Sorry I didn't take any photos when we were doing the experiment it was because we were having to much fun doing the experiment so we forgot.