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Unformatted text preview: 13. Reheat the dish for 2 minutes, cool and reweigh, record 14. If the weight differ by more than 2%, repeat the 2 minute cooling cycle until the weight difference is less than 2%. 15. Once a stable solid is obtained, very slowly add 25 mL of 1M HCl to the evaporating dish and stir for 2 minutes to react the CaCo 3 . 16. Carefully pour off the liquid so that the solids remain 17. Repeat with 10 mL portion of 1M Hcl two times, then was with a 10mL portion of distilled water. 18. Dry and check for constant weight (less than 2% variation) 19. Weigh the evaporating dish to 0.001 grams record....
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This note was uploaded on 05/14/2008 for the course CHEM 103 taught by Professor Kramer during the Spring '08 term at University of Delaware.
- Spring '08