Write the mechanism of hydration of ethene to yield ethanol

mechanism for the hydration of ethene THE MECHANISM FOR THE ACID CATALYSED HYDRATION OF ETHENE This page describes the mechanism for the hydration of ethene to make ethanol using phosphoric(V) acid as the catalyst. The hydration of ethene to make ethanol A reminder of the facts Ethene is mixed with steam and passed over a catalyst consisting of solid silicon dioxide coated with phosphoric(V) acid. The temperature used is 300°C and the pressure is about 60 to 70 atmospheres. Note: If you are interested in the Use the BACK button on your browser to return to this page. The mechanism for the hydration of ethene This assumes that you know about the electrophilic addition reactions of ethene, and about the use of curly arrows in organic reaction mechanisms. If you aren't happy about either of these follow the link below before you go any further. Note: Follow this link for the These pages are in a completely different part of the site. The quickest way to return here is to use the BACK button on your browser, or the history file or the Go menu if you get seriously waylaid! All the steps in the mechanism below are shown as one-way reactions because it makes the mechanism look less confusing. It doesn't affect the argument, but in fact all the steps are reversible. Step 1 All of the hydrogen atoms in the phosphoric(V) acid are fairly positively charged because they are attached to a very electronegative oxygen atom. Note: If you aren't sure about Use the BACK button on your brows...

Step 1 : Formation of protonated alcohol. Step 2 : Formation of carbocation. `H-underset(overset(|)(H))overset(underset(|)(H))(C)-underset(overset(|)(H))overset(underset(|)(H))(C)-overset(underset(|)(H))(O^(+))-H overset(Slow)(hArr) H-underset(overset(|)(H))overset(underset(|)(H))C-underset(overset(|)(H))overset(underset(|)(H))(C^(+)) + H_(2)O` Step 3 : Formation of ethane by elimination of a proton.

Q. Ethanol can be converted into ethene which can be changed into ethane. Choose the correct word or phrase from the brackets to complete the following sentences. (a) The conversion of ethanol into ethene is an example of (dehydration, dehydrogenation). (b) Converting ethanol into ethene requires the use of (conc. HCl, conc. H N O 3 , c o n c . H 2 S O 4 ). (c) The conversion of ethene into ethane is an example of (hydration, hydrogenation). (d) The catalyst used in the conversion of ethene into ethane is commonly (iron, nickel, cobalt).