User:Melissa Novy/Notebook/CHEM-572/2013/01/30/2013/02/05

Objectives

• Analyze LMT-95Ag with X-ray diffraction.
• Analyze LMT-95Ag filtrate with silver ion-selective electrode.
• Begin ion exchange reaction with AgNO₃ and LMT to obtain LMT-100Ag.

Calculations

  MW AgNO3: 169.87 g/mol
  MW Ag+: 107.86 g/mol
  CEC Laponite: 55 meqv/100 g
  1.5 g LMT × (55 meqv/100 g LMT) × (1 mol Ag+/1000 meqv) × (107.86 g Ag+/1 mol Ag+) × (1 mol Ag+/1 mol AgNO3) × (1 mol AgNO3/169.87 g AgNO3) × 100% = 0.000524 g AgNO3

Laponite-Ag⁺ Ion Exchange

• The protocol from 2013/01/29 was followed. However, the solution will be stirred for 1 week, instead of 24 hours.
• Theoretical mass Laponite: 1.5 g
  • Actual mass Laponite: 1.49711 g

• Theoretical mass AgNO₃: 0.000524 g
  • Actual mass AgNO₃: 0.00622 g

• Observations: The solution became opaque and white in color after all components were added.