Oxygen and Hydrogen
Level Elementary
Concept
Zinc and manganese dioxide can be taken out from the used dry battery. Oxygen and hydrogen are produced by using the acid, the hydrogen peroxide and the two materials of the dry battery. The property of oxygen and hydrogen is examined.
Working
Taking out zinc and manganese dioxide from the dry battery The dry battery is taken apart, and zinc on the surface and inside manganese dioxide, a carbon at the center, and an upper and lower iron plate are divided separately.
preparation of Oxygen
Materials
dry battery (1.5V), dry battery (9V), hydrogen peroxide, water tank, PET bottle (2), straw, steel wool, spirit lamp, match, deflagrating spoon, radio pincers, nippers, and glass bottle
Procedure
(1)The hole for the straw to the cap of the PET bottle is made. Surroundings of the hole are closed with clay so that the gas should not leak here through the straw.
(2)The water substitution is prepared by putting water in the water tank, and using the PET bottle.
(3)The manganese dioxide and the hydrogen peroxide are put in the PET bottle, and the cap with the straw is done.The produced oxygen should be collected in the PET bottle quickly. Because the reaction will end in a short time, it is points.
Level Elementary
Concept
Zinc and manganese dioxide can be taken out from the used dry battery. Oxygen and hydrogen are produced by using the acid, the hydrogen peroxide and the two materials of the dry battery. The property of oxygen and hydrogen is examined.
Working
Taking out zinc and manganese dioxide from the dry battery The dry battery is taken apart, and zinc on the surface and inside manganese dioxide, a carbon at the center, and an upper and lower iron plate are divided separately.
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| Experiment with Oxygen and Hydrogen tools |
preparation of Oxygen
Materials
dry battery (1.5V), dry battery (9V), hydrogen peroxide, water tank, PET bottle (2), straw, steel wool, spirit lamp, match, deflagrating spoon, radio pincers, nippers, and glass bottle Procedure
(1)The hole for the straw to the cap of the PET bottle is made. Surroundings of the hole are closed with clay so that the gas should not leak here through the straw.
(2)The water substitution is prepared by putting water in the water tank, and using the PET bottle.
(3)The manganese dioxide and the hydrogen peroxide are put in the PET bottle, and the cap with the straw is done.The produced oxygen should be collected in the PET bottle quickly. Because the reaction will end in a short time, it is points.
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| Experiment with Oxygen |
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| Experiment with Oxygen testing |
Experiment 2
Preparation of Hydrogen
Materials
dry battery, dilute hydrochloric acid or dilute sulphuric acid , water tank, film case, test tube (2), match and nippers
Procedure
- The hole is made for th e cap of the film case
- The zinc plate is cut small by nippers
- The zinc plate and the dilu te hydrochloric acid are put in the film case and cap it.
- If the vinegar is used for th e replacement of the dilute hydrochloric acid or diluted sulphuric acid, the hydroge n is produced slowly.
- The film case is put in the water tank. the produced hydrogen is collected in the test tube by the water substitution.
- The mouth of the test tube is caped by using the thumb.
- The match's fire is brought close to the mouth of the test tube, the thumb is opened, and the reaction is seen.
- The reaction when half air is put in the test tube is examined, too.
Question
Why the difference of two reactions happens is discussed about.
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| Preparation of Hydrogen diagram |
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| Preparation of Hydrogen Testing |
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