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Chemistry LibreTexts

14.2: LeChatlier's Principle Prep

  • Page ID
    209452
  • Materials
    • 10 - 24 hole well plates
    • Plastic beral pipets – 8mL
    • Toothpicks
    • Two hotplates, set up in each hood with 800 mL beakers on them

     

    Chemicals

    Prepare 5 sets and place part one and two on one end of bench and part three on the other end. 

    Part I

    • 1 L 0.1 M NaHSO4 sodium hydrogen sulfate 
    • 1 L 0.1 M Na2SO4 ­­ sodium sulfate 
    • 20 g Solid NaHSO4 sodium hydrogen sulfate 
    • 200 mL Thymol blue indicator solution 

    Part II

    • 1 L 1.0 M MgCl2 magnesium chloride 
    • 500 mL 0.5 M NaOH sodium hydroxide 
    • 500 mL 0.5M Na4EDTA sodium EDTA 
    • 200 mL Phenolphtlalein indicator solution 

    Part III

    • 500 mL 0.15 M CoCl2 in methanol - (the CoCl2 must be placed in the oven for at least 24 hours before making up the solution. It must not be in the hydrated form.) – Leftovers are in the flammable cabinet
    • 20 g CaCl2 solid 
    • 500 mL 0.1 M AgNO3 

     

    Place in two bottles, one in each hood. 

    200 mL Concentrated hydrochloric acid

     

    Waste bottles needed for part III only. Please label with those chemicals.

     

    SDS Info

    • Sodium Hydrogen Sulfate – Corrosion – eye damage
    • Sodium Sulfate – None
    • Magnesium Chloride – None
    • EDTA – Exclamation point – eye irritant
    • Cobalt Chloride – Exclamation point – Harmful if swallowed; Health hazard – May cause allergic skin reaction; Health Hazard – respiratory sensitizer, may cause allergy or asthma symptoms; Health Hazard – reproductive toxicity; Health hazard – carcinogen; Health hazard – mutagenicity; Environmental – aquatic toxicity
    • Methanol – Flame – flammable; Health hazard – toxic if swallowed, in contact with skin or if inhaled; Skull and crossbones – causes damage to organs
    • Calcium Chloride – Exclamation point – eye irritant
    • Silver Nitrate – Flame over circle – oxidizer; Corrosion – may be corrosive to metals; Corrosion – Skin corrosion/burns; Corrosion – eye damage; Environmental – aquatic toxicity