14.2: LeChatlier's Principle Prep
- Page ID
- 209452
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- 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