0
This is called collecting over water, or displacement of water or pneumatic trough collection.
Ex 6. Method for preparing and collecting a gas of any density by reacting a solid-liquid, as long as the gas is not too soluble in water! (dissolving or reacting). All gases are less dense than liquid water and will displace the water downwards. No good for soluble gases like ammonia, hydrogen chloride, nitrogen dioxide or sulphur dioxide. You can collect in inverted gas jar if bigger sample required. You have to watch for 'sucking back' effects. Examples:
(i) Making oxygen from hydrogen peroxide solution using manganese dioxide catalyst. Oxygen has similar density to air so must be collected by methods Ex 5., Ex 6. or Ex 7.
2H2O2(aq) ==> 2H2O(l) + O2(g)
(ii) Hydrogen, (iii) carbon dioxide and (iv) chlorine (moderately soluble, makes 'chlorine water')
Taken from http://www.docbrown.info/page13/ChemicalTests/GasPreparation.htm
Hope this helps!
What else can I help you with?
What is the method used to collect a gas?
Gas can be collected using various methods such as downward displacement of water, over water displacement, or through absorption into a liquid. The choice of method depends on the physical and chemical properties of the gas being collected.
Why were you able to collect butane gas through water displacement method?
Butane is Hydrocarbon, and hydrocrabons are insoluble in water, so they can be bubbled through water with very little of it going into solution. This makes, water displacement is a good method for collecting them.
How do you collect ammonia gas?
Ammonia gas can be collected by the downward displacement of air because it is lighter than air. It can also be collected by the upward displacement of air because it is water soluble and less dense than air. Additionally, it can be collected using a gas syringe or gas-collecting bottle attached to the reaction vessel where ammonia is being generated.
Why ammonia can't be collected over water?
Ammonia is highly soluble in water and will readily dissolve in it. This can lead to inaccuracies in the collection process, as the ammonia gas will be quickly absorbed by the water, affecting the volume and concentration of the collected gas. To accurately collect ammonia, it is best to use a technique such as downward displacement of air or a gas syringe.
Gas collected by displacement of water?
Gas can be collected by displacement of water using the principle that gases are less dense than water. The gas is generated in a reaction and displaces the water in a container, causing the gas to rise and be collected in an inverted vessel. This method allows for the collection and measurement of the gas produced in the reaction.
What is the method used to collect a gas?
Gas can be collected using various methods such as downward displacement of water, over water displacement, or through absorption into a liquid. The choice of method depends on the physical and chemical properties of the gas being collected.
Why were you able to collect butane gas through water displacement method?
Butane is Hydrocarbon, and hydrocrabons are insoluble in water, so they can be bubbled through water with very little of it going into solution. This makes, water displacement is a good method for collecting them.
Why did Antoine lavoisier collect hydrogen chloride gas by displacement of mercury?
Antoine Lavoisier collected hydrogen chloride gas by displacement of mercury in order to obtain a pure sample of the gas for further study and analysis. The method allowed him to separate and collect the gas without it reacting with the atmosphere or other components present in the reaction.
How do you collect ammonia gas?
Ammonia gas can be collected by the downward displacement of air because it is lighter than air. It can also be collected by the upward displacement of air because it is water soluble and less dense than air. Additionally, it can be collected using a gas syringe or gas-collecting bottle attached to the reaction vessel where ammonia is being generated.
Why ammonia can't be collected over water?
Ammonia is highly soluble in water and will readily dissolve in it. This can lead to inaccuracies in the collection process, as the ammonia gas will be quickly absorbed by the water, affecting the volume and concentration of the collected gas. To accurately collect ammonia, it is best to use a technique such as downward displacement of air or a gas syringe.
Gas collected by displacement of water?
Gas can be collected by displacement of water using the principle that gases are less dense than water. The gas is generated in a reaction and displaces the water in a container, causing the gas to rise and be collected in an inverted vessel. This method allows for the collection and measurement of the gas produced in the reaction.
How can chlorine gas be collected?
Chlorine gas can be collected by the downward displacement of air method. This involves bubbling chlorine gas through a solution, usually of water, causing the gas to displace the air in the container and collect in the top of the container. The chlorine gas can then be collected by carefully pouring or siphoning it out.
What is the purpose of the graduated cylinder in the collection of hydrogen gas by water displacement?
A graduated cylinder is a laboratory equipment. Its purpose in the collection of hydrogen gas by water displacement is for measuring and mixing the volume of liquid.
Can carbon monoxide gas collected by downward displacement of water?
No, carbon monoxide gas cannot be collected by downward displacement of water because it is less dense than water and will not displace the water. A gas that is less dense than water will not be trapped within the water, causing it to simply rise to the surface.
Why can't chlorine gas be collected by the method of water displacement?
because it is highly soluble in water
How can one efficiently collect gas over water?
To efficiently collect gas over water, one can use a gas collection apparatus such as a gas syringe or inverted graduated cylinder. The gas can be produced through a chemical reaction or by bubbling it through the water. By displacing the water with the gas, it can be collected in the apparatus for measurement or analysis.
What must be produced for a double displacement reaction to occur?
A precipitate, water, or a gas must be produced for a double displacement reaction to occur.
