Student Name Teacher Class Date Mass, Volume, and Density II. Objectives: Upon completion of the lab, the student will be able to identify metals using density and understand the relationships between mass, volume, and density. III. Theory: Using the mass and the volume of an object, the student will be able to identify a metal by finding the metals density. A balance can measure mass, which is best, defined as the amount of matter in a sample.
Fluke Multimeter 7311 Procedure: The 2000 micro strain exists right at the fulcrum point and fades off towards the end of the bar. The gage was mounted over the fulcrum of the testing rig with about 40% towards the short side, and 60% towards the long side of the beam. The solder and wires were left facing the operator at the long end of the beam. Mounting of the gage follow a procedure given by Vishay Measurements Group in 309E “Student Manual for Strain Gage Technology” These are the exceptions to the directions: No solvent was used for pre-abrasion, or catalyst for the adhesive. To check the circuit, a ohm meter was hooked up across the two leads to check for 120 ohms and each lead to ground was checked for infinite resistance.
The calorimeter was designed in 1780 by a chemist named Antoine Lavoisier with help from a mathematician by the name of Pierre Simon de Laplace. Now a widespread tool, we will be using the calorimeter, and our knowledge of equations to find the specific heat of zinc and aluminum. OBJECTIVE/GOAL In this experiment we will Measure the mass and temperature of water in a calorimeter Heat a metal sample of a known mass to a specific temperature Calculate the change in water temperature caused by adding the hot metal sample Calculate the specific heat of the metal using your mass and temperature data PROCEDURE 1. Prepare a data table as directed in the Analysis. Safety goggles and lab apron must be worn for the experiment.
Chemical kinetics Date: 20th, Aug., 2010 Name: Huang Shiqi A0078026E Email address: sunnyqi0801@gmail.com Class No. : Fr1 Lab partner: Jerome Lime A0073046L Abstract: The stated objectives of the experiment were to determine the reaction orders and rate constant of a chemical reaction, using the method of initial reaction rates and to determine the activation energy from the temperature dependence of the reaction rate based on Arrhenius’ theory. The chemical reaction used was iodide-persulfate reaction. Based on the equation: R = k [I-]n[ S2O82-]m and Arrhenius equation, the orders, rate constant (k) and activation energy can be calculated. The orders of the reaction were 2(n=m=1), k was 0.004174 L mol-1s-1 and the activation energy was 82.577kJ/mol.
13-3 Hydrogen Peroxide Iodine Clock: Oxidation of Potassium Iodide by Hydrogen Peroxide Source: B. Z. Shakhashiri (1992) Chemical Demonstrations: A Handbook for Teachers of Chemistry, vol. 4. pp 37-43. Description: Two colorless solutions are mixed. After 10 seconds, the colorless mixture suddenly turns blue.
Name: ADEYANJU, ADEBOYE OLUWATOMI Lab section: B02. Rotation: 1 Lab Room#: 206 Locker#: 1171 Date of Experiment 27/01/2015 Time: 8:30 AM Submission date 01/02/15 Experiment 2 Determining the identity of an Unknown Liquid. Purpose The purpose of this experiment is to determine the identity of an unknown substance by calculating; I.) II.) The density, The boiling point.
Title: Heating Curves and Phase Diagrams Course: Chemistry 1412 – General Chemistry II Objective Activity One: In this experiment, the student will plot a vapor pressure vs. temperature graph and will discuss, interpret, and analyze it. Activity Two: In this experiment, a variety of values will be provided and the student is to recreate a phase diagram and interpret the meanings of the values. Activity Three: In this experiment, the temperature probe with start with a reading temperature that is well below the freezing point, and with that, the graph (Temp vs. Time) will be recorded and observed as time progresses in its natural direction. The Heating Curve will then be analyzed. Materials and Summary of Procedures Activity One: In this experiment you will need a Graphing Calculator and some Paper and Pencils.
Titration Lab Period 3 5/20/12 Objective: The main objective of this lab was to determine the amount of sodium hydroxide needed to neutralize 10 milliliters of hydrochloric acid. We also had to calculate the molarity of the sodium hydroxide using our data. Concepts: Some different concepts used in this lab: indicators, titration formula, titration curves, pH levels, acids, and bases. Materials: Materials used in this lab: a 250mL beaker, ring stand, burette, Erlenmeyer flask, stop cock, burette clamp, 10mL HCL, 10mL NaOH, 3 drops of phenolphthalein, and pH paper. Procedure: 1.
ABSTRACT: The purpose of this experiment was to determine the rate constants and ionic strengths of the series and to prove the Bronsted relation. In order to do so, known amounts of KI, Na2S2O3, KNO3, EDTA, starch and K2S2O8 were mixed up, and placed in the spectrophotometer until the %T reached 60%, and time was recorded. In the first part of the calculations, for flask 1, 2 and 3, the true reaction rate was calculated using the equation k = (1/∆t) x ([S2O32-]/[Iodine][S2O82-]). Which resulted in values of 2.8878765.66 x 10-3 s-1 , 3.159845 x 10-3 s-1, and 3.079703 x 10-3 s-1, these values are all similar to each other since they contain no electrolyte reacting with the persulfate solution. The apparent reaction rate was calculated using the equation, kapp= (1/∆t) x ([S2O32-]/[S2O82-]) which resulted in apparent rate constants of 5.66 x 10-5 s-1, 6.1958 x 10-5 s-1, 6.0356 x 10-5 s-1.
Name: Jeffrey S. Webster Date: 8th October, 2007 Course: BC21D ID No. : - Lab Partners: Paul Bair, Jermaine Levy, Rochelle Allen Aim To extract and purify the enzyme invertase, thereby allowing for subsequent study of the effects of the parameters of [enzyme], [substrate], pH, temperature, and inhibitors on invertase activity. Method As outlined in the BC21D lab manual. Effect of Temperature on reaction velocity Place 1.0 ml of sucrose and 0.8 ml of pH 4.7 acetate buffer into a test tube and incubate for 6 minutes in a water bath at 37 oC. Add 0.2 ml of yeast invertase and incubate at the same temperature for 6 mins.