Analysis: Utilizing the Lab Pro software, we were able to observe a very accurate real-time change in the freezing point of the T-Butyl alcohol after adding an unknown. This change in freezing point was used to calculate the molality of the unknown, as well as it’s molar mass by using it’s measured weight. Comparing the molar mass of the unknown to the chart, it was obvious that the unknown was Isopropyl alcohol, which has a molar mass of 60.1 (g/mol), […]
In Galileo’s Dialogues Concerning Two New Sciences, he notes that a ball rolling down a uniform incline accelerates uniformly. Unfortunately, the most accurate tool to available to Galileo was a water clock, and this experiment has been designed to confirm his results using more-precise measurements from a motion detector and computer software. Similar to previous experiments, a test-cart was observed in motion down an incline track and using the Logger Pro software, precise graphical representations were created. Data Table for […]
Analysis of Vitamin C in Juice Product, Data in Slides 12-14 (1) Molarity of Standard Ascorbic Acid Solution Standard Solution of AA = (0.05 (g AA/100mL) x 1000mL)/176.1(g AA/mol) = 2.84 x 10-3 M (2) Molarity of DCP Solution Standard Solution of DCP = (2.84×10-5mol DCP/33.57mL DCP) x 1000mL = 8.50×10-4 M in Trial 1 (3) Mass of Ascorbic Acid Titrated in Juice Sample Ascorbic Acid Mass Titrated in Juice = ((8.5×10-4) mol DCP/1000mL) x (13.61 mL DCP) x (176.1 […]
Objective: The purpose of this experiment is to determine an unknown diprotic acid by examining its molecular weight using titration. Procedure: (1) Dissolve 0.120 g of the unknown in 100 mL of distilled water. (2) Place the 250 mL beaker ontop of a magnetic stir plate, and suspend a pH electrode into the solution using a ring stand. (3) Fill buret to 0 mL level with sodium hydroxide, prepare computer software. (4) Wait for pH to stabilize then keep data […]
Introduction: Isaac Newton’s Third Law of physics states that for every action there is an equal and opposite reaction. This principle describes interactions between bodies, and an experiment has been conducted to study these relations. In the following, two Force Sensors were utilized in connection with computer software to observe and generate graphical data for such interactions. Analysis: (1) Examine the two data runs. What can you conclude about the two forces? How are the magnitudes related? How are the signs […]
INTRODUCTION This experiment was designed to investigate the relationship between work, potential energy, and kinetic energy. Applying equations learned in Physics class, it was possible to compare these to values measured by computer software. Examples used in the experiment were a cart, a spring, and a mass. Preliminary questions: 1. Lift a book from the floor to the table. Did you do work? To answer this question, consider whether you applied a force parallel to the displacement of the book. […]
