Analysis of Hydrated copper sulphate Essay

Aim To determine the molecular formula of hydrous copper convert.Requirements Hydrous copper sulphateElectronic differenceEvaporating lookerGlass rodTripod stand etna burnerCrucibleProcedure scratch I weighed 3g of hydrous copper convert on electronic balance and began heating it in an evaporating dish on top of a Bunsen burner. aft(prenominal) the reaction was complete I measured the new pitch to find a change in mass.Qualitative data After the reaction was complete, the colour changed from blue to fresh delinquent to a qualifying of pee crystals.Faint unfledged tinge became evident and fine white powder was formed from crystals. Continued heating led to formation of oliver green colour.Quantitative data Original weight of hydrous copper sulfate 3gError in electronic balance 0.001g (provided by the teacher)selective information prayer Trial 11.96gTrial 21.87gTrial 31.94gData Processing To minimize the fallacys I conducted three trials and averaged the readings to find a more(prenominal) accurate answer.= 1.93 g 0.001Change in mass = (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 mill mass of 18g. Therefore the change in mass must be equal to the mass of water present 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 0.588 determination Hence the x apprize can be rounded shoot to 5 to get an integer answer. This means that in 1 jot of hydrous copper sulfate at that place ar 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 no deviation becau se the answers are taken as integer and decimal points are excluded. The only opinionated error present was in electronic balance. Moreover stochastic error could have been caused during heating of the salt i.e. overheating or underheating. This error depends on the sight of colour change, therefore this is a really hard random error to eliminate.Evaluation As the answer is taken as integer, there seems to be zero error however still a disseminate of errors are possible while conducting this experiment. During the heating of hydrous copper sulfate there maybe some water crystals still left due to inappropriate rousing and overheated or underheated salts could have also caused error. main(prenominal) error which is inevitable is the hydration of crystals later being heated. The reaction is reversible and the after heating there could have been water vapour in the propagate which could have combined with the salt. Hence these can also lead to deviations in results. To improve upon these errors 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 proper stirring and care taken during heating can also minimize errors.