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Work in the Laboratory Index

How to work in a Science Laboratory: Laboratory Rules
Laboratory Rules Quiz
How to use a Bunsen burner
Scientific Apparatus
The Measuring Cylinder
The pH Scale
Experiment to Test the pH of Different Solutions
The Cooling Curve of Water
The Preparation of Gases in the Laboratory

Work in the Laboratory Index

 

Collection by downward delivery

e.g. hydrogen chloride gas and carbon dioxide gas.

 

Collection over water

e.g. hydrogen, nitrogen, methane and oxygen.

 

Collection by upward delivery

e.g. ammonia gas.

 

 

WORK IN THE LABORATORY

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Collecting Gases

The method of collecting a gas produced by a chemical reaction will depend on its solubility and its density.

 

Collection by downward delivery

Collection by downward delivery

This method is used for gases which are soluble in water but more dense than air

 

 

Collection over water

Collection over water

It is the best method of collecting a gas so long as the gas is insoluble or slightly soluble in water. This method can be used for insoluble gases which are more dense or less dense than air.

 

 

Collection by upward delivery

Collection by upward delivery

This method is used for gases which are soluble in water but less dense than air.

 

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