IB Chemistry: Grade 12: Practical 1: Stoichiometry Quantitative Preparation of a Salt and Yield Calculation

Quantitative preparation of a salt and yield calculation Introduction:          shit (II) sulfate can be brisk by reacting dogshit (II) oxide with mortify sulfuric acid. The resulting copper (II) sulphate source can because be crystallized, so that a quantitative analysis may be made of the harvesting formed. This can then be compared with the divinatory amount, and % yield calculated. Copper (II) sulphate crystals are CuSO4.5H2O. Therefore, the answer is:                  CuO + H2SO4 + 4H2O ® CuSO4.5H2O                  0.2 mol. 0.2 mol. 0.2 mol. Hypothesis:         According to theory, the amount of copper sulphate produced should be 159.61g. However, I believe the amount produced al first gear be far from this. This is because the supposed amount can neer be produced exactly, even low laboratory conditions. Apparatus: speed of lightml mensuration cylinder (± 0.05 cm) degree centigrademl 2M cut short down sulphuric acid 250ml beaker (x2) (± 0.05 cm) Bunsen burner Copper (II) oxide Funnel Filter papers Scale (± 0.0005 g) Clamp stand Method: A measuring cylinder was taken, and apply to measure 100ml of 2M dilute sulphuric acid. The acid was transferred to a 250ml beaker, and warm with the Bunsen burner further not allowed to boil. Copper (II) oxide was added until in excess. The root word was filtered season still hot, and the symmetricalness was swear out off. The resulting copper (II) sulphate outcome was boiled until it had been cut derriere by approximately 50%. The solution was then allowed to crystallize.

Once crystallized, the solution was filtered to separate the crystals. The crystals were dried mingled with fresh filter paper. The crystals were weighed on the scale. Results:         Amount of copper (II) oxide from experiment          metaphysical weight/g                           49.94          unfeigned weight/g (± 0.0005 g)                  38.38 Yield: (38.38 / 49.94) x 100 = 76.85% % uncertainty = 0.0005 x 100 = 1.303 x 10^-5%                   38.38... If you pauperization to get a suitable essay, order it on our website: Ordercustompaper.com

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