Gravimetry

• Gravimetry is an analytical technique based on measuring the mass of the analyte.
• Precipitative gravimetry relies on the chemical precipitation of an analyte.

  • Gravimetric titrations are an example of this type of gravimetry (also called precipitation titrations) = titrations whereby the analyte is quantitatively and stoichiometrically precipitated by a standard solution.
• Precipitative gravimetry relies on the chemical precipitation of an analyte.
• Solubility of a solid is determined by its solubility product constant =Ksp. Molar solubility of a solid can be calculated using its Ksp.

  • Ksp= [concentration of the product times together].
• Common ion effect- if an ion of the solid is also present in the solution, Le Chatelier's principle dictates a shift in the equilibrium.