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- Step 1. There is no first step.
- Step 2. Activate your hot plate, set it to five.
- Step 3. Acquire your unknown, NOTE ITS NUMBER, and weigh out between an eighth of and a grams of it in your two-fifths liter beaker.
- Step 4. Dissolve your unknown in a tenth of a liter of water.
- Step 5. Slowly, add fifty milliliters of Pb(NO3)2, while stirring.
- Step 6. Place this on your hot plate, do not let it boil, and stir steadily until the liquid turns transluscent.
- Step 7. Place this on a hot pad to cool. Add a drop of Pb(NO3)2. If nothing happens, you're done. If anything does, add ten more milliliters and repeat step six.
- Step 8. After some time, place the beaker in an ice bath and let it cool for a sixth of an hour.
- Step 9. Arm your ring stand. Knick a Büchner funnel, the support thereof, a filter flask and a touch of filter paper. Weigh the filter paper.
- Step 10. Assemble the funnel and corresponding equipment. Place filter in FUNnel. Activate vacuum, spray with deionized water. If any sound is made, fix the seal.
- Step 11. Apply beaker to funnel, properly.
- Step 12. Clear all solids through the filter, if any appear.
- Step 13. Wash the funnel thrice with a hundredth of a liter of deionized water each time. Let dry for five minutes.
- Step 14. As above, but substitute C2H3O2^- for deionized water, and wait only two-fifths as long.
- Step 15. Weigh the precipitate.
- Step 16. Place beaker in drying oven.
- Step 17. Bin the unused liquid in a large waste beaker. Return the equipment you will no longer use, and tidy up a bit.
- Step 18. Clean your Büchner funnel properly, and return it after drying.
- Step 19. Weigh your precipitate after removing it from the drying oven.
- Step 20. Calculate the mass of the iodide that was in the sample.
- Step 21. Calculate the standard deviation.
- Step 22. Tidy up.
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