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11 Nov 2019
Please answer the following
(14 pts total) In Activity l of this lab, you investigated three common types of laboratory measurement glassware: a beaker, a graduated cylinder, and a volumetric pipet. 1. a. (4 pts) Rank these three types of glassware in order of lowest to highest precision as determined by the data in the lab. b. (4 pts) Consider that you were asked to add the measurement lines to an unmarked thermometer such as the one shown in the figure to the right. Provide a detailed explanation of the procedure you could use to draw accurate measurement lines on the thermometer. Be sure your procedure clearly indicates how to determine where the lines are drawn and how many total lines you will add to the thermometer (2 pts) Based on the procedure you have provided, what would be the decimal precision of your newly-designed thermometer (every 1 degree, 0.1 degree, 0.01 degree, etc.)? c. d. (4 pts) Briefly explain (in 1-2 sentences) how your procedure ensures that the lines you have drawn are accurate. 2, (4 pts) Using the equation for Beer's Law (A = εbc), mathematically demonstrate how the units on molar absorptivity () cancel with the units on path length (b) and concentration (c), leading to a dimensionless absorbance value. Set up your equation using 'typical' formatting for unit conversion and dimensional analysis problems, crossing out units as they cancel.
Please answer the following
(14 pts total) In Activity l of this lab, you investigated three common types of laboratory measurement glassware: a beaker, a graduated cylinder, and a volumetric pipet. 1. a. (4 pts) Rank these three types of glassware in order of lowest to highest precision as determined by the data in the lab. b. (4 pts) Consider that you were asked to add the measurement lines to an unmarked thermometer such as the one shown in the figure to the right. Provide a detailed explanation of the procedure you could use to draw accurate measurement lines on the thermometer. Be sure your procedure clearly indicates how to determine where the lines are drawn and how many total lines you will add to the thermometer (2 pts) Based on the procedure you have provided, what would be the decimal precision of your newly-designed thermometer (every 1 degree, 0.1 degree, 0.01 degree, etc.)? c. d. (4 pts) Briefly explain (in 1-2 sentences) how your procedure ensures that the lines you have drawn are accurate. 2, (4 pts) Using the equation for Beer's Law (A = εbc), mathematically demonstrate how the units on molar absorptivity () cancel with the units on path length (b) and concentration (c), leading to a dimensionless absorbance value. Set up your equation using 'typical' formatting for unit conversion and dimensional analysis problems, crossing out units as they cancel.
Sixta KovacekLv2
9 Sep 2019