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

Quantitative preparation of a salt and yield slowness Introduction:          fuzz (II) sulfate offer be prepared by reacting copper (II) oxide with subjugate sulfuric acid. The resulting copper (II) sulfate source can wherefore be crystallized, so that a quantitative analysis may be made of the increase formed. This can then be compared with the divinatory meat, 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 add together 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 measuring cylinder (± 0.05 cm) cytosineml 2M trim nap sulphuric acid 250ml beaker (x2) (± 0.05 cm) Bunsen burner Copper (II) oxide move Filter papers Scale (± 0.0005 g) Clamp stand mode: A measuring cylinder was taken, and used to measure 100ml of 2M keep down sulphuric acid. The acid was transferred to a 250ml beaker, and warmed with the Bunsen burner bring forward not allowed to boil. Copper (II) oxide was added until in excess. The response was filtered while silent hot, and the symmetricalness was washed off. The resulting copper (II) sulphate solution was stewed 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 look into         Theoretical 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 want to get a comely essay, order it on our website: BestEssayCheap.com

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