Analysis of Hydrated copper sulphate Essay Example for Free

Analysis of Hydrated copper sulphate Essay mien To determine the groincular formula of hydrated copper sulfate.Requirements Hydrous copper sulfateElectronic poiseEvaporating dishGlass rodTripod standBunsen burnerCrucibleProcedure First I weighed 3g of hydrated copper sulfate on electronic balance and began heating it in an evaporating dish on treetop of a Bunsen burner. After the reaction was complete I heedful the new weight to divulge a change in multitude.Qualitative data After the reaction was complete, the colour changed from blue to flannel due to a loss of body of water crystals. Faint green tinge became evident and fine whitened powder was formed from crystals. Continued heating led to formation of oliver green colour.Quantitative data accredited weight of hydrous copper sulfate 3gError in electronic balance 0.001g (provided by the teacher) information collection Trial 11.96gTrial 21.87gTrial 31.94gData Processing To background the faultings I conducted thr ee trials and averaged the readings to find a more accurate answer.= 1.93 g 0.001Change in band = (3 0.001) (1.93 0.001)= 1.07 0.002The change in mass was due to the loss of water crystals. Water (H20) has a molar mass of 18g. Therefore the change in mass must be equal to the mass of water correspond in copper sulfate.No of moles of water evaporated = = 0.059 0.002molesThe molar mass of anhydrous copper sulfate is 159.6g.No of moles of = = 0.012 0.001molesIn the equation I took the no of moles of water as x because it is unknown.CuSO4.xH20 CuSO4 + xH2OAccording to the equation the mole ratio between copper sulfate and water is 1 x. Therefore 1x = 0.012 0.001 0.059 0.002x = = 4.9 0.588Conclusion Hence the x value can be rounded off to 5 to reap an integer answer. This means that in 1 molecule of hydrous copper sulfate there be 5 atoms of water present as crystals. The result is also equal to the literature value which was provided by the teacher and there seems to be n o deviation because the answers are taken as integer and tenfold points are excluded. The only systematic erroneousness present was in electronic balance. Moreover random error could have been caused during heating of the salt i.e. overheating or underheating. This error depends on the sight of colour change, because this is a very hard random error to eliminate.Evaluation As the answer is taken as integer, there seems to be zero error however lock in a lot of errors are viable while conducting this experiment. During the heating of hydrous copper sulfate there maybe some water crystals still left due to inappropriate stirring and overheated or underheated salts could have also caused error. Main error which is inevitable is the hydration of crystals after being heated. The reaction is reversible and the after heating there could have been water vapour in the air which could have combined with the salt. Hence these can also lead to deviations in results. To improve upon these er rors we must make sure that after the salt is heated, its weight must be measured immediately so that there is very less time gap between it. Furthermore right(a) stirring and care taken during heating can also minimize errors.