Your Questions About Hydrogenation

Lisa Your Questions About Hydrogenation

Lisa asks…

What is the product of the hydrogenation of trans-2-pentene?

What is the product of the hydrogenation of trans-2-pentene?

a.2,3-dihydroxypentane
b.2-pentyne
c.cis-2-pentene
d.2-hydroxypentane
e.pentane

admin answers:

Hydrogenation would eliminate the double bond, so you would be left with pentane.

Jenny Your Questions About Hydrogenation

Jenny asks…

What is the difference between hydration and hydrogenation reactions?

admin answers:

Basic differance: Hydration is the addition of water & Hydrogenation is the addition of hydrogen.

Laura Your Questions About Hydrogenation

Laura asks…

How does hydrogenation of vegetable oils work?

I know the process requires a metal catalyst to bond the hydrogens to the double bond, so how do manufacturers get rid of the metal after it’s finished with the reaction?

admin answers:

In most of the cases the catalyst is insoluble and you can filter them out.
For hydrogentaion., Pd/H2 is one of the useful techniques…. But this catalyst will not be soluble.. Its a black powder.. After hydrogenation, you can filter it off.

I remembercatalysts like Raney Nickel or Raney Cobalt also will not soluble.. You need to filter them off on Celite porus plug.

Hope this info will help you

Sandra Your Questions About Hydrogenation

Sandra asks…

What is the balanced equation for the hydrogenation of propene?

Sorry for asking all of these questions… I am trying to review for my final today and I can’t seem to find these answers anywhere in the book..

admin answers:

C3H6 + H2 (Pt)–> C3H8

The (Pt) represents platinum ,which is used as a catalyst in the reaction (you can also use other suitable catalysts that might be listed in your book).

David Your Questions About Hydrogenation

David asks…

What is the process of Hydrogenation?

I know Hydrogenation is the addition of hydrogen atoms to a molecule; but what is the actual process of Hydrogenation?

A simplified explanation would be superb.

admin answers:

Hydrogenation is the chemical reaction that results from the addition of hydrogen (H2). The process is usually employed to a reduce or saturate organic compounds. The process typically constitutes the addition of pairs of hydrogen atoms to a molecule. Catalysts are required for the reaction to be usable; non-catalytic hydrogenation takes place only at very high temperatures. Hydrogen adds to double and triple bonds in hydrocarbons.

Because of the importance of hydrogen, many related reactions have been developed for its use. Most hydrogenations use gaseous hydrogen (H2), but some involve the alternative sources of hydrogen, not H2: these processes are called transfer hydrogenations. The reverse reaction, removal of hydrogen from a molecule, is called dehydrogenation. A reaction where bonds are broken while hydrogen is added is called hydrogenolysis, a reaction that may occur to carbon-carbon and carbon-heteroatom (O, N, X) bonds. Hydrogenation differs from protonation or hydride addition: in hydrogenation, the products have the same charge as the reactants.

An illustrative example of a hydrogenation reaction is the addition of hydrogen to maleic acid to succinic acid depicted on the right Numerous important applications are found in the petrochemical, pharmaceutical and food industries. Hydrogenation of unsaturated fats produces saturated fats and, in some cases, trans fats.

Betty Your Questions About Hydrogenation

Betty asks…

What would be the equation and product of the hydrogenation of propane?

Is it even possible to do this?

Would it be C3H10? What would that be called?

admin answers:

PropAne cannot be hydrogenated (or undergo any addition reaction) as each carbon already has four (single) bonds: it is a saturated compound.

PropEne can be hydrogenated:
C3H6 + H2 –> C3H8

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