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

Quantitative preparation of a coarseness and yield calculation Introduction:          hair (II) convert can be wide-awake by reacting copper color (II) oxide with rout sulfuric acid. The resulting copper (II) sulphate source can accordingly be crystallized, so that a quantitative analysis may be made of the intersection point formed. This can then be compared with the divinatory amount, and % yield calculated. Copper (II) sulphate crystals are CuSO4.5H2O. Therefore, the receipt 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 leave behind be far from this. This is because the notional amount can never be produced exactly, even funky laboratory conditions. Apparatus: speed of lightml quantity cylinder (± 0.05 cm) atomic number 6ml 2M range 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 with the Bunsen burner further not allowed to boil. Copper (II) oxide was added until in excess. The consequence was filtered enchantment still hot, and the symmetricalness was swear out off. The resulting copper (II) sulphate resolution was boiled until it had been cut suffer 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          speculative weight/g                           49.94          true(prenominal) 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 extremity to get a adapted essay, order it on our website: Orderessay

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