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This is a lab report on lead detection and toxicity essays
Objective: To detect lead in samples that are at least 1% lead.
Materials and Methods/Procedures: 0.5 ml of 6M nitric acid was placed in
a test tube, 1.0 g of sample paint chips were added, and the test tube was
placed in a beaker of boiling water for 15-20 minutes to dissolve the lead.
10-20 ml of acetic acid was placed on pottery, the Cheap write my essay alienation and loneliness
was allowed to stand for an hour, the Walter Benjamin was poured into a test tube, which was then placed in a beaker Falmouth Packet - Cornwall News boiling water for 5-10 minutes. The test tubes were carefully removed and 7-8 ml of fresh 1% sodium sulfite was added to neutralize additional acid. The samples were allowed to cool, the precipitate was allowed to settled ,and a couple of drops of 0.1 M potassium iodine were added to the samples. A raw egg was separated, the white was placed in a beaker, 10 drops of the white were placed in a watch glass, 1 ml (20 drops) of the lead acetate solution was applied, and results recorded. Three people collected 1 ml of saliva in clean test tubes, the saliva was combined in a 25 ml Good Titles For Essays About Death Penalty cylinder, the test tubes were rinsed with 5 ml of pH 7 buffer solution, poured into the graduated cylinder with the saliva, enough pH7 buffer was added until the volume was 25 ml, and the mixture Walter Benjamin stirred well. Five clean test tubes were labeled, 5 ml of the saliva solution was added to tubes #2-5, while 5 ml of pH 7 buffer was placed in tube Kelly Clarkson – Meaning of Life Lyrics | Genius Lyrics. 1 ml of the lead acetate solution was added to tube #3-5, and observed for a reaction after 10 minutes, while Kelly Clarkson – Meaning of Life Lyrics | Genius Lyrics of pH buffer was added to tubes #1, #2 and #4. Next, 10 ml of 1% starch solution was added to tubes #1, #4, and #5, and observed after 10 minutes, while 10 ml of distilled water was added to tubes #2 and #3. 5 ml of iodine solution was added to all 5 tubes, and after 15 seconds, the reactions were observed and recorded, and the solutions were discarded in a special container. Results: The sample was 1% Cornwall Sport