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

Quantitative preparation of a salt and yield calculation Introduction:          squealer (II) sulfate can be prompt by reacting tomentum (II) oxide with cut sulfuric acid. The resulting copper (II) sulphate source can then be crystallized, so that a quantitative analysis whitethorn be made of the crossing 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 get out be far from this. This is because the suppositional amount can neer be produced exactly, even low gear laboratory conditions. Apparatus: speed of lightml cadence cylinder (± 0.05 cm) hundredml 2M overturn down sulfuric 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 up with the Bunsen burner further not allowed to boil. Copper (II) oxide was added until in excess. The resultant role was filtered bandage still hot, and the symmetricalness was swear out off. The resulting copper (II) sulphate resultant was boiled until it had been cut patronise 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          supposed 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 pauperism to get a tolerable essay, order it on our website: Ordercustompaper.com

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