Preparation Of Dihydrogen
Chapter Name : Hydrogen |
Sub Topic Code : 102_11_09_03_01 |
Topic Name : Preparation Of Dihydrogen |
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Sub Topic Name : Laboratory Preparation Of Dihydrogen |
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Introduction
Dihydrogen is produced in the laboratory by 2 methods : • By the action of metals like Zn, Fe with acids (like HCl). • By the reaction of metals like Zn, Sn with alkalies (like NaOH).
Activity:
When HCl is added to the metal samples, hydrogen gas is evolved. This gas can be identified by bringing a burning splint close to the mouth of each of the test tubes. A pop sound is produced indicating the presence of hydrogen gas.
Real Life Question:
Can dihydrogen be produced in the laboratory?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Dihydrogen | In elemental form, hydrogen exists as a diatomic molecule and is called as dihydrogen. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Metal samples | Take samples of iron, magnesium, zinc and copper in different test tubes. |
| Dilute HCl | To each test tube, add a small amount of dilute HCl. |
Real life uses :
• Used for large scale production of hydrogen.
Places to visit :
Laboratory
Practical examples around us
| Examples | Explainations |
|---|
What you learn in Theory:
Methods of preparation of hydrogen gas in the laboratory.
What you learn in Practice:
Preparation and identification of hydrogen gas using acid and metal.