URGENT Year 9 chemistry IGCSE questions

[From: ] [author: ] [Date: 11-08-09] [Hit: ]

Heating up the substance2. Breaking apart the substance (more surface area)3. Mixing the reaction4. Use different concentrationsForth questiona) The temperature will make the particles move at an accelerated speed thus improving the probability that the particles will make contact and start the reactionb) The more concentration will allow for the reaction to have a greater accuracy and will improve the reaction rate. Also because if there are more reactants which is a greater concentration then there will be more reactions.c) Hear is example,......

I'm sure of those, too.

Hope that helps, good luck with the other questions.

EDIT: Should add in Collison Theory for clarity...

Reactions occur when particles collide with the right force and at the right angle to break intramolecular bonds, causing the now loose atoms to recombine into different substances.

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For first question
1. Heating up the substance
2. Breaking apart the substance (more surface area)
3. Mixing the reaction
4. Use different concentrations

Forth question
a) The temperature will make the particles move at an accelerated speed thus improving the probability that the particles will make contact and start the reaction
b) The more concentration will allow for the reaction to have a greater "accuracy" and will improve the reaction rate. Also because if there are more reactants which is a greater concentration then there will be more reactions.
c) Hear is example, place aluminum foil into a acidic container, make sure that the aluminum is in sheets. Now if a different container place aluminum foil (the same amount) except this time tear the aluminum into tiny pieces. The greater surface area allows the reactants a greater target for a reaction.

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