AS Chemistry OCR B (Salters) DF - Catalysts - Flashcards in A Level and IB Chemistry

Created on: 17-12-08 13:18

What is the correct definition of a catalyst?

A catalyst speeds up a chemical reaction, but can be recovered chemically unchanged at the end of a reaction.

1 of 6

Definition: "The speeding up of a chemical reaction using a catalyst"

Catalysis

2 of 6

Catalysts can often be reused, and only a tiny amount is needed for a large reaction. Why is this?

Because they are either chemically unchanged by the end of the reaction, or have reacted and remade.

3 of 6

Catalysts are ......... which means they will ............

specific to certain reactants, often only work on a single reaction.

4 of 6

What does the term "homogeneous catalyst" mean?

The catalyst is in the same physical state as the reactants.

5 of 6

Catalysts can.............so they don't work anymore.

be poisoned

6 of 6

Other cards in this set

Card 2

Front

Definition: "The speeding up of a chemical reaction using a catalyst"

Back

Catalysis

Card 3

Front

Catalysts can often be reused, and only a tiny amount is needed for a large reaction. Why is this?

Back

Card 4

Front

Catalysts are ......... which means they will ............

Back

Card 5

Front

What does the term "homogeneous catalyst" mean?

Back

View more cards

Comments

Matthew Hamer

Report Wed 6th May, 2009 @ 12:39

nice

beth

Report Wed 20th May, 2009 @ 10:36

helpful

Lauren Lovick

Report Sun 18th October, 2009 @ 11:19

helpful (even though I am doing AQA chem) It was quite good because the questions were not too easy

pooja patel

Report Mon 21st December, 2009 @ 19:27

very helpful thanks!

Jhyzone

Report Tue 22nd December, 2009 @ 16:39

i see your tricky strategy!

I'm off to revise more DF! :D

Thanks for this!

Mazin

Report Tue 5th January, 2010 @ 22:00

lol that was funny but nice and concise ;]

Taslima Baksh

Report Wed 13th January, 2010 @ 14:07

very good but please make more- i need it!!!

Emma

Report Sat 24th April, 2010 @ 11:47

how do you find out the right answers if you get something wrong? Very good though :)

fmPerkins

Report Thu 29th April, 2010 @ 14:47

That was really helpful! I think I need to go back to Ideas and read up on homogeneous and heterogeneous :)

Nazmeen Chowdhury

Report Tue 11th May, 2010 @ 17:35

Really Good!!! will try it again when it's closer to exam time!

Elana Bryan

Report Wed 12th May, 2010 @ 09:57

Really good! A very useful recap!

Marianne Bradley

Report Sat 15th May, 2010 @ 11:15

Useful, thank you :)

Beenash

Report Sun 16th May, 2010 @ 11:10

Thanks, really helped! :)

WhatsHisFace

Report Tue 25th May, 2010 @ 19:05

Thanks, really helped! :)

Report Fri 4th June, 2010 @ 17:53

Really useful, it was good that the questions weren't too easy, but they summarised the key points!!

Francesco D'Alessio

Report Sun 24th October, 2010 @ 06:55

Really helpful ,

Needed this.

Cesi

claude bethy

Report Tue 11th January, 2011 @ 02:10

good

Vicky

Report Sat 30th April, 2011 @ 14:40

2wrong

i say pretty good for me :)

AnnaLouise

Report Sun 15th May, 2011 @ 18:59

It was good thank you :-) x

kayley lucken

Report Sun 22nd May, 2011 @ 17:55

question 6 is wrong it should be aBsorbtion not aDsorbsion

kidun

Report Tue 31st January, 2012 @ 22:16

Really good! A very useful :)

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