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

Quantitative preparation of a salt and yield reckoning Introduction:          bullshit (II) sulfate elicit be prompt 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 fruit formed. This can then be compared with the divinatory come, 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 derive 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. tool: speed of lightml measuring cyli nder (± 0.05 cm) coulombml 2M trim deal sulphuric acid 250ml beaker (x2) (± 0.05 cm) Bunsen burner Copper (II) oxide funnel Filter papers Scale (± 0.0005 g) Clamp stand mode: A measuring cylinder was taken, and used to measure 100ml of 2M adulterate sulphuric acid. The acid was transferred to a 250ml beaker, and warmed with the Bunsen burner set ahead not allowed to boil. Copper (II) oxide was added until in excess. The etymon was filtered while palliate hot, and the symmetricalness was washed off. The resulting copper (II) sulphate solution was poached 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 amid fresh filter paper. The crystals were weighed on the scale. Results:         Amount of copper (II) oxide from experiment         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 adequate essay, order it on our website: BestEssayCheap.com

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