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

Quantitative preparation of a salt and yield advisement Introduction:          fuzz (II) sulfate batch be nimble 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 crossing formed. This can then be compared with the divinatory tot up, 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 totality 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. setup: speed of lightml measuring cylinder (± 0.05 cm) blowml 2M trim guttle sulphuric acid 250ml beaker (x2) (± 0.05 cm) Bunsen burner Copper (II) oxide funnel shape Filter papers Scale (± 0.0005 g) Clamp stand rule: A measuring cylinder was taken, and used to measure 100ml of 2M snub sulphuric acid. The acid was transferred to a 250ml beaker, and warmed with the Bunsen burner hike not allowed to boil. Copper (II) oxide was added until in excess. The resolving power was filtered while passive hot, and the symmetricalness was washed off. The resulting copper (II) sulphate solution was turn 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 between fresh filter paper. The crystals were weighed on the scale. Results:         Amount of copper (II) oxide from sample         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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