Sunday 13 May 2007

Chemistry [[The Practical Exam]] Planning Technique

[[Working Out the Volume to Use]]

* Pick suitable volumes for the equipment that you are using and justify any measurements stated.

E.g,

CuO(s) + H2S04(aq) ---> CuSO4 + H2O

* reaction done in a 100ml beaker
* Saftey issues
* Use 25cm3 of H2SO4

- caluculate mass of CuO to use, using n = m/mr and n = v/1000 x c
= 2grams

In excess?
* think about how to seperate the final products
H2SO4 and CuSO4 cannot be seperated easily
Cu0 and CuSO4 can be seperated by filtering so double the value

= 4g of CuSO4

[[Measuring a Temperature]]
*change the concentraition to create a suitable change in temp



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