Question

how will you prepare Ethane from ethyl magnesium Bromide and write any two uses of alkenes​

Answer 1

Explanation:

Magnesium. Typically the reaction to form Grignard reagents involves the use of magnesium ribbon. All magnesium is coated with a passivating layer of magnesium oxide, which inhibits reactions with the organic halide.Grignard Reagents. The Grignard Reaction is the addition of an organomagnesium halide (Grignard reagent) to a ketone or aldehyde, to form a tertiary or secondary alcohol, respectively. The reaction with formaldehyde leads to a primary alcohol.

Answer 2

$CH_3CH_2MgBr + H_2O$ → $CH_3CH_3 + Mg(OH)Br$

Explanation:

The reaction of the Grignard reagent (R-Mg-X) with water gives alkanes.

∴ We can prepare ethane from ethyl magnesium Bromide -

The reaction is as follows -

$CH_3CH_2MgBr + H_2O$ → $CH_3CH_3 + Mg(OH)Br$

The product obtained is -

•  $C_2H_6$, Ethane

• $Mg(OH)Br$, is an inorganic salt known as a "basic bromide"

Two uses of alkenes​ are -

• Used as primary reactants during the synthesis of alcohols, plastics, detergents, and fuels
• Ethene is largely used in the polymer industry. E.g. PVC and polyethylene
• These polymers are used in the manufacture of synthetic fibers, floor tiles, raincoats, bottles, pipes, etc.