gravimetric problems

• Gravimetric Analysis


  A method of quantitative chemical analysis that measures the mass of a substance to determine its chemical composition
• Gravimetric Analysis Problems


  1. Weigh sample

  2. Precipitate compound

  3. Filter and weigh precipitate

  4. Calculate composition
• Gravimetric Analysis Problems


  • Determining percentage chloride in an impure chloride sample

  2. Determining percentage bromine in an organic compound
• Problem 1

  Weigh sample (0.7011 g)

  2. Precipitate AgCl (0.9805 g)

  3. Calculate mass of Cl (0.2425 g)

  4. Calculate percentage Cl (34.59%)
• Problem 2


  Weigh sample (0.4054 g)

  2. Sodium fusion to convert Br to NaBr

  3. Dissolve NaBr, acidify, add AgNO3

  4. Filter and weigh AgBr (37.8 mg)

  5. Calculate percentage Br (3.97%)