Table of Contents
Is amalgamated zinc is a compound?
Zinc amalgam neither an element nor a compound. It is an alloys containing zinc and mercury.
Why Hg is used in Clemmensen reduction?
So, in a way, the mercury in zinc amalgam serves to “trap” the active hydrogen as it is formed, and allow it to attack the carbonyl compound rather than be released as H2 gas. This is why zinc amalgam is used in Clemmensen reduction.
What type of solution is mercury in amalgamated zinc?
binary solution
It is a binary solution (liquid-solid) of mercury and zinc.
Does Zn Hg HCl reduce acid?
The reaction of aldehydes and ketones with zinc amalgam (Zn/Hg alloy) in concentrated hydrochloric acid, which reduces the aldehyde or ketone to a hydrocarbon, is called Clemmensen reduction.
What type of mixture is mercury in amalgamated zinc?
Answer:
| Type of Mixture | Homogenous Mixture | Heterogeneous Mixture |
|---|---|---|
| 3. Gas in solid | Hydrogen in palladium | |
| 4. Liquid in liquid | Ethyl alcohol + Water | Water + Oil, Milk |
| 5. Liquid in solid | Mercury in amalgamated Zinc | |
| 6. Solid in liquid | Sugar in water | Chalk in water, Dust in water |
Which product will form when acetone is reduce in the presence of amalgamated zinc and HCl * 1 point 1 propanol 2 propanol 2 Proponal N propane?
Aldehydes, Ketones and Carboxylic Acids. (i) Acetone undergoes clemmensen reduction in presence of zinc amalgam and conc. HCl to give propane.
What is the mixture of zinc amalgam and concentrated HCL is known as?
Explanation: The reaction of aldehydes and ketones with zinc amalgam (Zn/Hg alloy) in concentrated hydrochloric acid, which reduces the aldehyde or ketone to a hydrocarbon, is called Clemmensen reduction.
Why does gold dissolve in mercury?
Though a liquid, mercury is also a metal. The gold metal has a sea of electrons which are in constant motion. The atoms in the liquid can vibrate more and as a result of this metallic bond gets disrupted easily.
What is the role of zinc amalgam in Clemmensen reduction?
The zinc amalgam is used in Clemmensen Reduction as the reaction of zinc with hydrochloric acid releases hydrogen gas (H₂). In this way, zinc amalgam acts to trap the active H₂ gas as it is formed, and it also allows to attack the carbonyl compound rather than it released H₂ gas.
How does the Clemmensen reduction work?
The Clemmensen Reduction works well with other acid-insensitive ketones or aldehydes. With an excess of amalgamated zinc (mercury treated zinc, Zn (Hg) and concentrated hydrochloric acid (HCl), the carbonyl compound is heated.
What happens when HCl reacts with zinc amalgam?
However, when this reaction takes place with zinc amalgam, the individual hydrogen molecules that are formed by the reaction of zinc with HCl remain in a reactive state (sometimes called “nascent hydrogen”) and reacts with the ketone to initiate the reduction reaction.
Why can’t zinc be used to catalyze the reduction reaction?
Powdered Zinc or chunks of the metal cannot be used to directly catalyze the reduction, as they are not activated enough. The adition of mercury to the Zinc evenly distributes the metal throughout the amalgam, increasing the rate of reaction and also raising the activation energy of Zinc to a level necessary for the progress of the reaction.