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Damped Harmonic Motion Lab Report

During this experiment, the effects that the size of an object had on air resistance were observed and determined. To do this, a spring was set up with a circular object hanging at the end. After the spring constant of 9.0312 N/m was measured, equations were used to determine a calculated frequency, that being 7.252 Hz. Four trials—each with a different sized, same massed object—took place where the object was pulled and allowed to rise and fall, while a sonic ranger motion sensor graphed the object’s position. The graphs created were transferred into Igor Pro, where a non-linear fit was created. From this fit, the damping constant of the object’s motion was given, and the effect of air resistance on…

Oxalate ION

The dissociation of protons from oxalic acid proceeds in a stepwise manner as for other polyprotic acids. Loss of a single proton results in the monovalent hydrogenoxalate anion HC2O4−. A salt with this anion is sometimes called an acid oxalate, monobasic oxalate, or hydrogen oxalate. The equilibrium constant (Ka) for loss of the first proton is 5.37×10−2 (pKa = 1.27). The loss of the second proton, which yields the oxalate ion has an equilibrium constant of 5.25×10−5 (pKa = 4.28). These values imply that, in solutions with neutral pH, there is no oxalic acid, and only trace amounts of hydrogen oxalate.[1] The literature is often unclear on the distinction between H2C2O4, HC2O4-, and C2O42-, and the collection of species is…

Evaluation of a Gas Constant (Experiment 3)

Experiment 3: Evaluation of Gas Constant Purpose: The purpose of this lab is to demonstrate the ideal gas law under ordinary conditions. In this lab, the variables in the ideal gas law are known or can be found aside from the constant R. Thus, the R values can be found and relatively determine the relevancy of the ideal gas law to the lab conditions. The ideal gas law was tested using the reaction: Mg (s) + 2HCl2 (aq) H2 (g) Procedure: 1. Ribbons of magnesium (5) were cut to the approximate length of the instructor’s example and were weighed separately on scale #1. 2. HCl provided by the instructor was added to a eudiometer tube (8mL). The rest of the…