Buret Setup and Experiment Procedures for Accurate Measurements

EXPERIMENT 1 Name (Print Clearly) V\(\wa Werdlickaon Seat# 7% Lab Instructor Pr Kimn Lab Partner Lab Day Fr'\dO\Li Lab Time |0, 55 am Date Zé,/'z_q Buret Check List Check Set Up 1. Inspect your buret stand. Make sure that all of the bumpers are present on the buret clamp. Make sure the clamp opens and closes properly. 2. Clamp buret in a straight vertical position on buret stand. The buret should sit properly in T the groove of the bumpers. Release the clamp gently to fully secure the buret. 3. Make sure stopcock is closed prior to filling the buret. The handle should be in a v horizontal position. 4. While the buret is in its stand, use a funnel to fill the buret with liquids from a beaker. Vv Remove funnel immediately after filling the buret. 5. Rinse buret with deionized water to clean, including the tip of buret. 6. Rinse buret with the experimental liquid to remove any remaining water, including the tip v of the buret. Experimental Liquid Name DT u0tec 7. Fill the buret with liquid for the experiment close to 0 mL, just make sure to stay within \/ the calibration marks. It does NOT need to be exactly 0 mL. ¥ 8. Make sure to remove any air bubbles from the tip of the buret. Vs Experimental Readings 9. Read the initial volume on the buret. Make sure to read the volume at the bottom of the meniscus. Estimate one digit past the smallest markings. Place value of estimated digit is TA/Instructor intials W & 10. Dispense liquid into container and record final volume on the buret. Make sure to read the volume at the bottom of the meniscus. Estimate one digit past the smallest markings. Place value of estimated digit is 3 Clean Up 11. Properly dispose of any remaining liquid in the buret. 12. To clean the buret, rinse the buret with approximately 50 mL of water. Make sure to leave the buret in the stand and use a funnel and beaker as before. General Procedures 13. I only refilled the buret when I did not have enough liquid in the buret to complete the next trial. 14. I read the bottom of the meniscus for each reading. bk Signature of Student: Signature of TA/Instructor: 39 Scanned with CamScanner

EXPERIMENT 1 — Questions and Calculations Name (Print Clearly) medua Hendrickssa Seat#_23 Lab Instructor Dr. Ky, Lab Partner Lab Day Rfigs§ Lab Time \( S am Date ‘.Izgym Show the following calculations for Trial 1. Make sure to show the formula, plug in your data values for trial 1, use the appropriate significant figures and units of measure! 1. Volume of DI water (trial 1) = 0 Tora| ;(Fi el -10 4\*\0.\3 Tk ial votune = 0-00m b~ The final volupae = 3.3mL — 2.3 L -0.00mL =2 .30mL The Hota) Lolume — 2.30mL 2. Mass of DI water (trial 1) = \‘—mc\ \NO‘\U‘(\N dgw - wd) Mass of weigh dish = b i L Mass of Locigh disiy Soker= 6:30qoms 7 2 205973 25 car Moasgs of Locder- 3.253mm5 3. Density (trial 1) = Dms'r\‘% :Oﬂ%g)m L ’ 7,.‘2%4. 3Dl 0489 me ((mass of water s total Uo\umd—j\ 4. Average density for all trials = 0-9%+ 0.98+0%7+0.99+ 0. 5% =Y H/6 2 0-8%3lm6 Aw ”‘fi‘ [’/MS)HLg -0. %%g/mt, 41 Scanned with CamScanner

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5. Based on the slope of the graph, how did the average density compare to the actual density of water at 25°C (1.00 g. mI"')? Were any of the trials off from the average value of density? —The avevage densiyy compared 4o the actuc)\ clen\sH'Lg 0f woder, hyur i+ wos off & J ’ om Yhe, cwver vedue of dansivv oy a tfenth. T ) 211 wea of¢ bLO 0'\25("\(' Q€ - 04 O'-Cé(o:o-\’z_ 6. A student calculated a density of water as 1.15 g/mL from his/her experimental data. What errors could have happened during the experiment to have this occur? (Please do not use math calculation error — think about things that could have happened as you did the experiment) Some ervor that couldrpe P LG (o e Student misjudaed Hhe o | ‘e buret. i QJ%@ et 42 Scanned with CamScanner

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