Method for Preparation of Aspirin

Topics: Titration, Liquid, Sodium hydroxide Pages: 2 (443 words) Published: February 2, 2013
4.2 Separation Techniques & Assessment of Purity By Grace Ngana

|P3 |You have briefly written up what you did in measuring the melting point in 3rd person past tense. |

Determining the melting point of aspirin

• Firstly we turned on the melting point equipment; we referred to data tables for the actual value for the melting point of the aspirin. • Then we arranged the equipment to a point below the expected melting point we then noted that the rate of heating will influence the reading of the melting point. • Afterward we dipped the sealed capillary tube provided into the sample of our aspirin prepared until we got sufficient depth (about few mm) of the sample contained in the tube. • Further more we gently tapped the tube to allow the solid to fall to the bottom. • Then we placed the sample tube into the hole next to the thermometer in the melting point equipment. • We observed the melting of the aspirin sample through the magnifying glass. • At the point when the compound began to melt, we recorded the temperature using a thermometer. • When the melting was complete, we recorded the final thermometer reading this was the full temperature range of the melting point. • Finally we compared our results to the known data values. |P3 |You have briefly written up what you did in the titration of river water in 3rd person past tense. |

Titration to test the purity of water, by determining the concentration of HCl in the water.

• Using a pipette and pipette filler, we accurately pipetted 25 cm3 of 0.010 mol dm-3 sodium hydroxide solution into a conical flask. • Then we added a few drops of methyl orange indicator and placed it on the white tile. This solution was then titrated with the water obtained from the river. • After we stood the burrette up using a stand and clamp. • We then filled up the burrette to approximately the 0.00 mark with the river water provided...
Continue Reading

Please join StudyMode to read the full document

You May Also Find These Documents Helpful

  • Aspirin Preparation Essay
  • Preparation and Recrystallisation of Aspirin Research Paper
  • Preparation of Aspirin and Determination of the Melting Point Essay
  • Aspirin Essay
  • Aspirin Essay
  • Essay about Aspirin
  • Aspirin Essay

Become a StudyMode Member

Sign Up - It's Free