AQA GCSE CHEMISTRY Unit 1 Question Game!

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What is the process of hydration of ethene:
State the conditions required and the product produced

Hydration of ethene is when ethene is reacted with steam to produce ethanol in the presence of a catalyst.

And in terms of conditions, I don't think you need to know them but I think it's high temperature (that's the condition for many things in chemistry so I'm just guessing)

Reply 101

JakeMcLellan

Original post by IAmAnTroll

What is hardening / hydrogenation?

Reacting unsat oils with hydrogen, opens up some double bonds.
60 degrees, Nickle catalyst.
Good shelf life and cheap for making things like buiscuits
Lots a naughty trans fat which ain't good for ya pal.
Bob's your uncle (psychic tell me about it)

Reply 102

Snake_God

Original post by kefalos23

Give two examples of alloys (2) :smile:

Stainless Steel

Low Carbon Steel

Reply 103

t10r

Original post by kefalos23

Give two examples of alloys (2) :smile:

Steel and Cupronickel

Reply 104

GeorgeMillerr

Original post by kefalos23

Give two examples of alloys (2) :smile:

Steel: Carbon and Iron
Brass: Copper and Zinc

Reply 105

JakeMcLellan

Original post by kefalos23

Give two examples of alloys (2) :smile:

Bronze and steel - copper and tin and iron and carbon, add chromium for a fancy finish (stainless steel)

Reply 106

JakeMcLellan

What is metal fatigue? (In the spec)

Reply 107

IAmAnTroll

Describe the order of alkanes and alkenes...

E.g. Methane

Reply 108

kefalos23

What are the features of an emulsifier molecule? (2)

Reply 109

Smartgirl1999

Explain Wegner's continental drift theory (what he noticed and the actual theory)

Reply 110

GeorgeMillerr

Original post by t10r

Yes correct, it would be a temperature above 100 degrees hence the steam but you don't need to know the exact temperature but a range of 100-400 will suffice,
Now you've answered that hence give me another way of making ethanol

Reply 111

Smartgirl1999

Original post by JakeMcLellan

What is metal fatigue? (In the spec)

When strain and stress is put on to the metal, causing it to break, which can be dangerous

Reply 112

JakeMcLellan

Original post by kefalos23

What are the features of an emulsifier molecule? (2)

Hydrophilic head
Hydrophobic tail
In reverse for oil
Tail sticks in the oil, head repeals other oil particles.
Oil is left suspended and shaking the mixture seperates them

(edited 7 years ago)

Reply 113

EmmanuellaUwaifo

Original post by chocomad1999

When strain and stress is put on to the metal, causing it to break, which can be dangerous

Omg do we need to no this 😂😂

Reply 114

4dam

Original post by IAmAnTroll

Describe the order of alkanes and alkenes...

E.g. Methane

General formulas:

Alkane - CnH2n+2
Alkene - CnH2n

Alkanes finish in ANE
Alkenes finish ENE

Order:
1.Meth...
2.Eth...
3.Prop...
4.But...

Reply 115

t10r

Original post by kefalos23

What are the features of an emulsifier molecule? (2)

An emulsifier molecule has two parts: hydrophobic and hydrophilic. The hydrophobic part stretches out and attaches to the water whereas the hydrophobic part stays inside the oil droplet.

Just as an additional note, the way the emulsifier allows the water and oil to mix is that the hydrophobic parts are negatively charged so they repel other negatively charged hydrophobic parts from other oil droplets. This allow the droplets to be spread across the water. Also, the emulsifier make the oil droplets unable to separate as the hydrophobic part is attached to the water and hydrophilic to the oil.