Syllabus point (1 Viewer)

[hscishard]

Identify the need for a catalyst in a adding water to ethylene.

I cant find it in conquering chem

 

[ohexploitable]

You need an acid catalyst. H₂SO₄ is commonly used.

 

[study-freak]

for hydration, dilute H+ (H2SO4 will do)
for dehydration, conc H+ (H2SO4)

 

[hscishard]

Identify the need for a catalyst. Not identify the catalyst.

 

[ibbi00]

Like all catalysts, it reduces the activation energy required for the reaction to proceed. Nothing more specific from memory =(

 

[Aquawhite]

Identify the need for a catalyst. Not identify the catalyst.

I assume this is in reference to the hydration of ethylene into ethanol? A catalyst is needed in order to allow the reaction to proceed by lowering the activation energy and helps to break apart the double bond in the ethylene. If there is no catalyst, nothing will occur between then two substances.

 

[hscishard]

Ahh thx.

Thought there was something special about it.

 

[FCB]

A catalyst is needed because the acid breaks the C-H and C-OH bonds, this allows for formation of a double bond. Water itself cannot break the double bond as it isnt reactive enough

 

[ibbi00]

A catalyst is needed because the acid breaks the C-H and C-OH bonds, this allows for formation of a double bond. Water itself cannot break the double bond as it isnt reactive enough

This answer did not yield me two marks in my half yearlies as a word of advise. Reducing activation energy would have.

 

[Aquawhite]

This answer did not yield me two marks in my half yearlies as a word of advise. Reducing activation energy would have.

Just a note; lowering the activation energy within molecules is the definition of a catalyst in the HSC course, or at least the types of catalysts used in the HSC are for this. Some other specific catalysts do other things, but you need not know.