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Unformatted text preview: unknown metal. Place some in the 10 ml gc. Weigh the cylinder with the metal to nearest .01 gram and record. Add water and using the pipet adjust the volume to exactly 10 ml.weight the cylinder with the unknown sample to its original container. Determine density of the unknown metal and record. Then use table to identify unknown metal. Part C : determination of salt solution 1. Obtain a sample of each NaCl solutions. 5, 10 ,15, 20 percent by weight. 2. Clean and dry 10 ml gc 3. Fill cylinder to exactly 10 ml. with 5 ppercent 4. Dry outside and weigh to .01 gram 5. Record 6. Repeat 7. Find density 8. Make a graph density (y) vs % composition ( X). 9. 25 ml flask, obtain unknown from the storeroom. 10. Record data 11. Repeat 2-5 uknown 12. Determine density 13. Determine percent comp. of unknown and record Safety Broken glass, wear glasses....
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- Spring '08