CHemistry As Level Coursework(TITRATION)

Can i anyone pls give me guidelines on writing the 'Planning' for the chemistry titration coursework.......especially the bit were we are meant to describe how you will find the accurate concentraion of the sulphuric acid.......

Reply 1

generalebriety

Your exam board website will give you rough guidelines. If you have any problems further than that, you'll have to give us a slightly more specific question.

Reply 2

I am not Gerald

especially the bit were we are meant to describe how you will find the accurate concentraion of the sulphuric acid.......

Are you titrating Sulphuric acid against sodium carbonate? If you are, the formula for the reaction looks like this (even if you aren't, just use this as an example to see how you have to do it):

Na2CO3 (aq) + H2SO4 (aq) -> Na2SO4 (aq) + CO2 (g) + H2O (l)

What does that tell you? It shows you that one mole of sodium carbonate reacts with one mole of sulphuric acid.

You roughly know the concentration of your sulphuric acid, so now you can guess what the concentration of your second solution should be (for example if 1 mole sulphuric acid reacted with 2 moles of another chemical...you would need twice as much of the other chemical, so the concentration of your other chemical should be double (if you kept the volumes the same))...so what do you think a suitable concentration would be for your second chemical?

After you've decided on that, you can figure out how much of everything you'll need to create this solution, using the following two equations:

No. of moles = concentration (mol dmˉ³) * volume (dm³)

Mass (g) = No. of moles * Mr

Other parts of your planning should include:
-List of apparatus used
-Instructions on how to carry out the experiment
-Health and safety (What are the risks of the chemicals you're using?)
-Justification of design (How did you choose your indicator and decide on your concentrations?)
-List of references used

:tsr2: