Even More Fun With Science
On Tuesday, I had my last chemistry prac for this semester. Do you know what that means?
That means I had to make a polyiodide salt, crystallise it (pretty metallic-bluey-green flakes) and analytically determine the number of iodine atoms in the molecular formula. We did the redox titration with sodium thiosulfate and starch as the indicator. Sounds like fun? Well, it was more like a delirium – I overshot the mark on the 50mL volumetric flask and had to do the weighing of the crystals again – with half an hour left. I managed to get only 3 titrations done – luckily, two of them were 0.1mL apart (concordant). And then we had to do the washing up and the calculations – on a sheet stained all over with brown iodine solution. Yuck.
Good thing I finished. The formula of my compound turned out to be N(CH3)4I(I2)2. Smashing.
And we got to use methanol. Exciting.
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