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genchem:determination_of_chemical_formula

Synopsis

  1. First, students determine the number of waters of hydration in MgSO4 by ignition to constant mass to remove the water. Second students determine the percent mass of NaCl in a mixture of NaCl and MgSO4 xH2O.

Prepper Supplies

  1. Nickel crucibles, Clay triangles, wire gauze, iron rings, ring stands
  2. MgSO4-xH2O, mixtures of NaCl-MgSO4.xH2O (make new unknowns if there aren's enough)

Prepper Special Instructions: Determination of x in MgSO4.xH2O requires 3g. The same amount of unknown is needed for the unknowns. Stir the unknowns to make sure homogeneous.

Instructor Notes/Comments

genchem/determination_of_chemical_formula.txt · Last modified: 2016/06/07 09:53 (external edit)