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chem lab exercise 1 (ii).

# chem lab exercise 1 (ii). - Name Norkhairin Yusuf Subject...

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Name: Norkhairin Yusuf Subject: Chemistry Lab II Instructor: Paul Madden LAB EXERCISE 1 : CALIBRATION OF A VOLUMETRIC PIPET Data : Temperature of Water : 20 o C Density of Water : 0.998 g/mL Mass of Wash Bottle : 27.872 g TRIAL MASS OF BOTTLE+WATER, g VOLUME OF PIPET, mL MASS OF WATER, g 1 37.738 g 10 mL 9.867 g 2 47.605 g 10 mL 9.936 g 3 57.541 g 10 mL 9.936 g 4 67.408 g 10 mL 9.867 g 5 77.338 g 10 mL 9.930 g Average Volume of Water : 9.93 mL Average Deviation : 0.14 mL Standard Deviation : 0.0020 mL 95 % Confidence Interval : 9.93 ± 0.0025 : 9.92mL – 9.93mL Question 1 Does the confidence interval include 10 mL ? No, as the upper confidence limit is 9.9522mL CALCULATION : Trial 1: Mass of Water, g = Mass of Wash Bottle + Water, g – Mass of Wash Bottle, g = 37. 738 g – 27.872 g = 9.867 g 2: Mass of Water, g = Mass of Wash Bottle + Water, g – Mass of Wash Bottle + Water Trial 1, g = 47. 605 g – 37.738 g = 9.936 g

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Name: Norkhairin Yusuf Subject: Chemistry Lab II Instructor: Paul Madden 3: = 57.541 g – 47.605 g = 9.936 g 4: = 67.408 g – 57.541 g = 9.867 g 5: = 77.338 g – 67.408 g = 9.930 g Volume of water, mL = , , / Mass of water gDensity of Water g ml Average Volume of Water, mL = = + + + + Volume of Water
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