hydrogen Flashcards
why is zinc used instead of any other metal in a reaction?
it is used as it does not react violently and it’s not very expensive
name the characteristics of hydrogen
odorless, colourless, tasteless
name the occurrence of hydrogen
in the atmosphere, in plants, in clouds
why does water have a high boiling point?
bc the molecules are linked by strong hydrogen bonds
define activity of series
metals are arranged on the basis of reaction
The chemical activity of metals as arranged in the cities, gradually __ from the ___ of the series
decreases from the top to the bottom
2Na + 2H2o ->
[action on cold water]
2NaOH + H2
2H2o —>
[electrolysis]
2H2 +O2
The hydrogen that is collected can be dried by passing through____
anhydrous calcium chloride
nitric acid is a – agent
oxidizing agent
give three points for the test of hydrogen
- hydrogen bonds with a pale blue flame
- A burning splinter is put up with a pop sound
- neutral gas
what is the electrolysis preparation of hydrogen also called as?
Hoffmans voltameter
How does pure hydrogen burn?
it burns quietly with a non-luminous pale blue flame
what temperature does hydrogen liquidfie at?
-240 degrees Celsius
what is the color of hydrogen on the litmus paper
It’s unaffected
