Monday, January 13, 2014

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

Quantitative preparation of a salt and yield advisement Introduction:          copper color (II) sulfate bum be watchful 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 crossway 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 fare 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. utensil: speed of lightml measur ing cylinder (± 0.05 cm) light speedml 2M trim polish up sulphuric acid 250ml beaker (x2) (± 0.05 cm) Bunsen burner Copper (II) oxide move Filter papers Scale (± 0.0005 g) Clamp stand method acting: A measuring cylinder was taken, and used to measure 100ml of 2M load sulphuric acid. The acid was transferred to a 250ml beaker, and warmed with the Bunsen burner advertise not allowed to boil. Copper (II) oxide was added until in excess. The upshot was filtered while up to now hot, and the symmetricalness was washed off. The resulting copper (II) sulphate solution was boiled until it had been cut back by approximately 50%. The solution was then allowed to crystallize.
bestessaycheap.com is a professional essay writing service at which you can buy essays on any topics and disciplines! All    custom essays are written by professional w!   riters!
Once crystallized, the solution was filtered to separate the crystals. The crystals were dried amongst 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 adapted essay, order it on our website: BestEssayCheap.com

If you want to get a full essay, visit our page: cheap essay

No comments:

Post a Comment

Note: Only a member of this blog may post a comment.