Chem PAG 1.1 Determination of composition of copper (II) carbonate

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edwards.shan
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#1
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Any help on this question?

On the extension question 4 it asks to explain why it is not necessary to calculate he percentage uncertainty in the volume of H2SO4 (aq) used.
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ChemistryWebsite
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(Original post by edwards.shan)
Any help on this question?

On the extension question 4 it asks to explain why it is not necessary to calculate he percentage uncertainty in the volume of H2SO4 (aq) used.
Without knowing the full question it is impossible to answer your question with certainty.

One possibility: did you use an excess of sulphuric acid in the experiment?
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Pigster
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(Original post by TutorsChemistry)
One possibility: did you use an excess of sulphuric acid in the experiment?
Bingo.
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edwards.shan
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(Original post by TutorsChemistry)
Without knowing the full question it is impossible to answer your question with certainty.

One possibility: did you use an excess of sulphuric acid in the experiment?
The reaction was
CuCO3•Cu(OH)2 + 2H2SO4 —> 2CuSO4 + 3H2O + CO2
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ChemistryWebsite
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(Original post by edwards.shan)
The reaction was
CuCO3•Cu(OH)2 + 2H2SO4 —> 2CuSO4 + 3H2O + CO2
Great

Whether you used excess sulfuric acid depends on the amount you added in your experiment. How much did you add, and how accurately? Did you just add until there was no more effervescence?
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Hassara otsusuki
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(Original post by edwards.shan)
Any help on this question?

On the extension question 4 it asks to explain why it is not necessary to calculate he percentage uncertainty in the volume of H2SO4 (aq) used.
hey you must have finished this so can you help me on all the questions on 1.1,1.2 and 1.3
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Pigster
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(Original post by Hassara otsusuki)
hey you must have finished this so can you help me on all the questions on 1.1,1.2 and 1.3
Two things: firstly they posted this two years ago, which means they're probably at university now and probably don't have copies of the PAGs anymore and probably don't even visit TSR anymore.

And secondly, do your own PAGs!

Did you know that over 99% of people pass them? They aren't hard.
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Hassara otsusuki
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#8
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(Original post by Pigster)
Two things: firstly they posted this two years ago, which means they're probably at university now and probably don't have copies of the PAGs anymore and probably don't even visit TSR anymore.

And secondly, do your own PAGs!

Did you know that over 99% of people pass them? They aren't hard.
oh yeah I wasn't thinking straight but the thing is I lost my experiment results for all of them so I just need the experiment results
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