Monday, March 2, 2020
1. Preparation of Potassium Tetracyanonickelate(II)
- 14.5 grams nickel chloride hydrate + 7 grams KCN in 100 mL water. The ppt of nickel(II) cyanide is filtered off and washed.
- 2.07 grams nickel chloride hydrate in 10 mL boiling water + 1 grams KCN in 10 mL water
- The ppt is then mixed with 10 mL of water to form a slurry.
- To the slurry is added 7 grams of KCN in 15 mL water.
- The solution is then evaporated down until crystals begin to form. The solution is then chilled in ice.
Sunday, March 1, 2020
1. Preparation of Thorium Hydroxide
- Vial #1 of Thorium Hydroxide
- Mass (vial+lid+ThO2) = 20.37g
- Emission = ~3.10 μSv/hr
- First Th(OH)4 Preparation
- Mass (vial+lid+ThO2) after transfer of thorium hydroxide to beaker = 11.48 grams
- Mass of thorium dioxide = 8.89 grams
- Number of moles thorium dioxide = 0.0336691410 moles
- Molar mass of thorium dioxide = 264.04 grams / mole
- Theoretical yield of thorium hydroxide = 10.10 grams
- Molar mass of thorium hydroxide = 300.07
- The white thorium dioxide powder was transferred into a 250 mL beaker. ~60 mL of 88% sulfuric acid was added to the beaker and it was heated.
- It was found that the thorium dioxide solidified at the bottom of the beaker. With difficulty the solid mass is broken up with a glass rod.
- Addition of water seemed to create a large solid mass as the slurry cooled.
- More sulfuric acid was added and then more water until the total volume was ~250 mLs.
- The slurry was stirred via a magnetic stir bar over heat for about half an hour
- The heat was turned off while stirring was allowed to continue.
- The slurry was transferred to a 1 liter flask and water was added until the total volume was ~500 mL.
- Molten Potassium Bisulfate Experiment
- 1.7 grams of thorium dioxide was transferred to a 50 mL porcelain crucible
- Total mass of vial+cap+thorium dioxide after removal of material for experiment = 9.78 grams
Friday, February 28, 2020
1. Mercury(II) Cyanide Synthesis
- 7.3 g KOH + 14.4 g HgO in 100 mL of water
- 1.3 g KOH +2.56 HgO in 17.81 mL of water
- HgO Vial Weight = 27.13 grams
- Inorganic Laboratory Preparations pages 47-48
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