Tag : experiment

Chromatogram Student Experiement

By: Ciaran Forde and Catherine Garbutt ABSTRACT: All projects must be accompanied by an abstract. The abstract should briefly state the problem or purpose of the research, indicate the theoretical or experimental plan used, summarize the principal findings, and point out the major conclusions. Abstract length is one paragraph. INTRODUCTION: RESULTS & DISCUSSION: After analysis of the chromatograms obtained in the separation of solutions AP and PC we decided that the 70% pH 3.5 buffer with 30% methanol gave the […]

Synthesis and Characterisation of Gold-Silver nanoparticles

Abstract Solutions of chloroauric acid and silver nitrate were reduced using sodium citrate to form nanoparticles of varying composition, whose optical properties and physical dimensions were measured, giving the result that the molar extinction coefficients of the solutions increased exponentially with decreasing mole fraction of gold in solution. Introduction The interest in nanoparticles has grown exponentially over recent years, as scientists strive to explore the variance in electronic, optical and chemical properties with particle size. In this experiment, gold nanoparticles […]

Cis- Trans Equilibrium of N-Acetyl-L-Proline

Purpose: Using H-NMR, in this experiment we sought to study the effect of pH and polarity of the solvent on the Ktrans values of N-Acetyl-L-Proline. The Ktrans values are a means to examine the equilibrium between cis and trans isomers of N-Acetyl-L-Proline. The area under the peak of the H NMR was integrated and divided accordingly to give the Ktransvalues. Ktrans values were used in the calculation of the proportion of cis isomers in the sample. The picture below depicts […]

Modern Galileo Experiment

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 […]

Lab Parts: Evaluating Spring Constants with the Least Squares Method of Data Fitting

Student Researched Lab Experiment to evaluate Spring Constants Introduction In this experiment we evaluated Hooke’s law by measuring the stretch of a spring with incremental masses. A motion detector provided position measurements and the masses were added 100 grams at a time. To calculate the spring constant we utilized the least squares method of data fitting on a Force by distance graph. Samples Calculations Line of Best Fit: f(x) = 0.202x + 16.5 xi-mean height, yi-force of gravity (1) Mean […]

Lab Parts: Ball Toss & Fluid Resistance

Introduction In this experiment, a motion detector was used to collect distance, velocity, and acceleration data for different types of balls being thrown straight up in the air. Like a juggler who tosses a ball straight upward, each ball slows down on it’s path to maximum height, then begins to speed up on it’s way down. The concept is that there is a definite mathematical pattern to the changes in velocity, which will be reinforced by experimentation. Analysis (2) How […]