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http://www.gcsescience.com/idownwarddel.htm
How is a Gas Collected using Downward Delivery? A gas that is more dense than air can be collected by downward delivery. Examples of gases that can be collected by this method are carbon dioxide, chlorine, hydrogen chloride and sulfur dioxide. A gas jar is connected by a tube to the flask that is giving off the gas as shown in the picture below.
http://www.gcsescience.com/iupwarddel.htm
A gas that is less dense than air can be collected by upward delivery. Examples of gases that can be collected by this method are ammonia and hydrogen. A gas jar is connected by a tube to the flask that is giving off the gas as shown in the picture below. The gas...
https://www.answers.com/Q/What_is_the_difference_between_upward_and_downward_delivery
If you r talking about gases Downward delivery:-collecting gases which are denser than air. e.g. carbon dioxide, chlorine. upward delivery :-collecting gases which are less dense than air. e.g ...
https://mccowngordon.com/delivery-methods-analysis-and-comparison/
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https://www.answers.com/Q/Why_hydrogen_gas_collected_by_upward_delivery
May 17, 2009 · In Downward Delivery method, a gas jar is connected to the flask by a tube that is giving off the gas. The more dense gas fall to the bottom of the jar and displaces the air and the gas is collected in the jar. (ii.)CO2 can also be collected using the syringe. The syringe is connected by a….
http://saburchill.com/chemistry/chapters/chap047.html
Collection by downward delivery. This method is used for gases which are soluble in water but more dense than air . 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.
https://www.allinterview.com/showanswers/58272/what-is-downward-displacement-of-water.html
What is Downward Displacement of Water?.. Answer / al jaber In any chemical reaction to collect gas using water in beakers and testtubes.The gas from the reaction travels along the delivery tube the gas bubbles through the water and will rise into the water the gas then pushes the water until the test tube is full of gas this pushing of water ...
https://myschool.ng/questions/view/academic-questions/76617
Just know this:the heavier gas will always carry the lighter one and you can determine its weight by calculating its RMM.Heavy gases are always collected by upward displacement of air/downward delivery while light gases are collected by downward displacement of air/upward delivery.
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