Im abouit to take module 1 of AQA AS LEvel Chemistry, but i cant remember the formulas for it- can someone help me please?
2007-01-06 06:39:26 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
If you are trying to remember formulas for working out values in chemistry such as concentration, mass, number of moles etc. I always find the easiest way is to remember the units. For example concentration is M, which is really moldm-3 so therefore it is the number of moles (mol) divided by the volume in dm3. This can be applied to any equation in chemistry or physics, the units on one side have to equal the units on the other.
This way you can work out what any equation should be. (The only caution is it won't tell you if you have to add numbers with no units).
I'm a professional biochemist and still use this technique everyday to check my calculations.
If you are trying to remember equations like 2H2 + O2 ---> 2H2O
Just remember you need the same number and type of atoms on both sides of the equation. You will never be able to learn every chemical equation so try to learn the ones that come up a lot and then make sure you understand the rules about valency (also known as oxidation states), reactivity etc so that you can work them out.
Other than that in both cases practice makes perfect find some questions in a textbook or even make some up and try them out.
Good luck with the exams.
2007-01-07 01:41:13 · answer #1 · answered by Ellie 4 · 0⤊ 0⤋
the key is do lotz of exercise questions so that it will be easier for u to remember the formula.you also can write all the formulas on small papers(post-it) all stick them in ur room. another idea is to make songs or remember the create a funny story from the formula.try it,it'll help u!
2007-01-06 06:52:35 · answer #2 · answered by ixchel 1 · 0⤊ 1⤋
Get some post its. write out a different formula on each on , stick them around your bedroom e.g. on your wardrobe door, around the mirror etc. try and put logical groups together. whenever you have to go to that place in your room take a few minutes to read throught he ones there and test yourself.
They will soon stick
2007-01-06 06:44:19 · answer #3 · answered by D B 6 · 0⤊ 1⤋
i know the problem,but i just forgot.
the easiest way to remember is to go to a subject you enjoy doing!
2007-01-06 10:30:37 · answer #4 · answered by dornypcs 2 · 0⤊ 0⤋
Most are the same as they were at GCSE, for example:
moles = mass/Mr
moles = vol x molarity/1000
The big new one is pV = nRT
2007-01-06 06:45:24 · answer #5 · answered by Gervald F 7 · 0⤊ 1⤋
Well, there's not a lot I can do about (abouit) that, is there?
2007-01-06 06:49:33 · answer #6 · answered by Anonymous · 1⤊ 1⤋