Paint Making with Transition Metals

Making Paint Pigment

Malachite


Purpose: To create Paint Pigments using Transition Metal compounds

Safety Instructions
  • You must wear safety goggles at ALL times
  • You must tie back hair and loose clothing/jewlery
  • You must wear lab aprons or lab coats
  • You may wear gloves

Materials
  • 3 250mL beakers
  • 10 mL graduated cylinder
  • wash bottle
  • glass stir rod
  • ring stand
  • ring
  • funnel
  • 2 coffee filters
  • Copper (II) Sulfate (CuSO4)
  • Sodium Carbonate (Na2CO3)

Procedures
  1. In a 250 mL beaker, dissolve 12.5 g of Copper (II) Sulfate (CuSO4) in 50 mL of distilled water.
  2. In another 250 mL beaker, dissolve 5.0 g Sodium Carbonate (Na2CO3) in 55 mL of distilled water
  3. IN FUME HOOD: While stirring the copper sulfate solution vigorously with a glass stir rod, slowly add the sodium carbonate solution, This reaction produces carbon dioxide gas and must be done in the fume hood! A solid should form in the beaker
  4. Allow the solution to sit for several minutes. While waiting, prepare a filtration setup with a 250 mL beaker and a funnel and coffee filter.
  5. Decant the liquid from the mixture and filter.
  6. Using a wash bottle filled with distilled water, rinse the solid thoroughly as it sits in the filter paper.
  7. Label your sample and allow to dry.

Making Paint Pigment

Cobalt Yellow


Purpose: To create Paint Pigments using Transition Metal compounds

Safety Instructions
  • You must wear safety goggles at ALL times
  • You must tie back hair and loose clothing/jewlery
  • You must wear lab aprons or lab coats
  • You may wear gloves

Materials
  • 2 250 mL beakers
  • 1 50 mL beaker
  • 10 mL graduated cylinder
  • pipette
  • wash bottle
  • glass stir rod
  • ring stand
  • ring
  • funnel
  • 2 coffee filters

  • Cobalt (II) Chloride (CoCl2)
  • Acetic Acid
  • Potassium Nitrite (KNO2)

Procedures
  1. In a 250 mL beaker, dissolve 1.0 g of Cobalt (II) Chloride (CoCl2) in 20 mL of distilled water
  2. Using a pipette or a 10 mL graduated cylinder, add 1 mL of concentrated Acetic Acid to your solution. Stir
  3. In a 50 mL beaker, dissolve 8.0 g of Potassium Nitrite (KNO2) in 20 mL of distilled water.
  4. Slowly pour the Potassium Nitrite solution into the beaker with the Cobalt Chloride solution. A solid will form.
  5. Allow the mixture to sit for several minutes. While waiting, prepare a filtration setup with a 250 mL beaker and a funnel and coffee filter.
  6. Decant the liquid from the mixture and filter.
  7. Using a wash bottle filled with distilled water, rinse the solid thoroughly as it sits in the filter paper.
  8. Label your sample and allow to dry.


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