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

Quantitative preparation of a salt and yield weighing Introduction:          papal bull (II) sulfate provoke be disposed(p) by reacting copper (II) oxide with subjugate sulfuric acid. The resulting copper (II) sulphate source can wherefore be crystallized, so that a quantitative analysis may be made of the intersection formed. This can then be compared with the divinatory fare, and % yield calculated. Copper (II) sulphate crystals are CuSO4.5H2O. Therefore, the reception is:                  CuO + H2SO4 + 4H2O ® CuSO4.5H2O                  0.2 mol. 0.2 mol. 0.2 mol. Hypothesis:         According to theory, the fare of copper sulphate produced should be 159.61g. However, I believe the amount produced will be far from this. This is because the theoretical amount can never be produced exactly, even low laboratory conditions. weapon: speed of lightml me asuring cylinder (± 0.05 cm) degree centigrademl 2M trim trim sulphuric acid 250ml beaker (x2) (± 0.05 cm) Bunsen burner Copper (II) oxide funnel shape Filter papers Scale (± 0.0005 g) Clamp stand system: A measuring cylinder was taken, and used to measure 100ml of 2M bring down sulphuric acid. The acid was transferred to a 250ml beaker, and warmed with the Bunsen burner however not allowed to boil. Copper (II) oxide was added until in excess. The issue was filtered while motionlessness hot, and the symmetricalness was washed off. The resulting copper (II) sulphate solution was boiled until it had been cut back 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 try         Theoretical weight/g    Â Â Â Â Â Â            Â!  Â Â Â Â Â Â 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 want to get a adapted essay, order it on our website: BestEssayCheap.com

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