AS OCR Chemistry UNIT 1 calculation problems!!

I'm having problems with all calculation questions in the unit 1 (moles, volume, conc. e.t.c..) Has anyone got anything that could help me?? Please this is the only part of Unit 1 i find challenging

Reply 1

games211

just write out all the equations you need to know on an A3 PAPER and stick it on your door

Reply 2

H_m007

Original post by games211

just write out all the equations you need to know on an A3 PAPER and stick it on your door

i know all the equations by heart, but don't know when to apply them 'cause i get easily confused with the questions

Reply 3

games211

I am doing AS too, what kind of ones..dont know if ill be able to help you though lol

Reply 4

H_m007

Original post by games211

I am doing AS too, what kind of ones..dont know if ill be able to help you though lol

Most titrations, Water of crystallisation and calculation volume and conc.

Reply 5

games211

Original post by H_m007

Most titrations, Water of crystallisation and calculation volume and conc.

have you got the cgp revision books?

Reply 6

H_m007

Original post by games211

have you got the cgp revision books?

i do

Reply 7

ProNoob

Concentration is measured in mol/dm3 or cm3.
Moles is measured in mol
Volume in solution is measured in dm3 or cm3. To get from cm3 to dm3 divide by 1000.
Volume in a gas is concentration divided by 24dm3 or 24000cm3. It would be a good idea to answer all of the questions on moles. Write the formula down on the side.

Posted from TSR Mobile