Coordinated Science for the 21st Century


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Unit 1: Active Physics

Unit 2: Chemistry

Unit 3: Active Biology

Unit 4: EarthComm

Unit 2: Chemistry

Test Tubes

c) In your log record any additional properties of the gas that you discovered.

Test Tubes

Safety goggles and a lab apron must be worn during this activity.

7. Next, examine the test tube that is full of gas (or contains the larger volume of gas). Light a wooden splint. Remove the stopper. Quickly bring the burning splint to the mouth of the test tube.

Record your observations.
What gas do you think was produced in this test tube?
In your log record any additional properties of the gas that you discovered.

8. Return the splints and equipment as directed by your teacher. Clean up your work station. Wash your hands.

9. Your teacher will demonstrate a way you can use what you investigated to produce a special effect.Your teacher will set up a gas generator, similar to the one shown in the diagram. The test tube contains 10 mL of 6M HCl (hydrochloric acid — a compound of

hydrogen and chlorine) and 3 g of mossy zinc.

What gas do you think is being produced in the test tube? Give a reason for your answer.

10. An egg has been emptied out. There is a small hole in the top and another in the bottom of the egg. One of the holes is taped. The egg will be placed over the gas generator, and gas will be collected in the egg for several minutes.

11. The egg will then be mounted in an egg holder behind a shield. If you have a video camera available, be prepared to start recording. Your teacher will remove the tape, and light the top of the egg with a burning splint. Begin recording or observing the reaction until it is over.

Record your observations in your log.
If the gas in the egg was hydrogen and air contains oxygen, what substance do you think may have been created in this process?