Lab Report

Lab report

The Acid Dissociation Constant, Ka Name: Candice Joseph Date: May 1, 2007 1. Purpose The purpose of this experiment was to determine equilibrium constant Ka for dissociation of acetic acid in aqueous solution. This will be done by measuring pH of aqueous solution of different concentrations of acetic acid. Besides, the class average value of …

Cell Membrane Transport Lab Report

A. Introduction: Cells are the most significant building blocks of all living things. They are also the tiniest living organisms in the human body which provides structure for the body and intake nutrients that become energy. Cell membranes control what goes in and out the cell, it protects it. The lipid bilayer describes the membrane …

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Mass Relationships in Chemical Changeslab Report

LAB # 6 MASS RELATIONSHIPS IN CHEMICAL CHANGES October 22, 2012 Patricia D Partner: Mike C MASS RELATIONSHIPS IN CHEMICAL CHANGES PURPOSE The purpose of this experiment was to study the fundamental idea that in chemical reactions, or changes, all particles of one substance will have the same average mass, but particles of different substances …

Lab report for Experiment Purpose: What is the purpose of this lab?

Title: Experiment #2: Extraction Purpose: What is the purpose of this lab? In your OWN words! Observations: Weighed out 3.2568 grams of chemical mixture that was yellow in color. Dissolved dry chemicals in 38 ml CH2Cl2 with gentle heating. Poured the yellow solution into sep funnel. Added 10 ml CH2Cl2 to flask to rinse, poured …

Lab Report 3 Steam Distillation and 4 Crystallization

Reuven Ilyayev Lab Instructor: Maciej Domaradzki Labs 3 & 4 09/19/11 Objective: In steam distillation lab (lab 3), we must obtain pure Eugenol from cloves through the process of steam distillation. In the crystallization lab (lab 4) part 1, we must acquire the best possible pure crystallization of acetylsalicylic acid from aspirin and in part …

Density Lab Report

Lab Report Density Name: Period: Problem How do you calculate Density? What units did you use for volume, mass, and density? When the cubes are placed in water which one will sink 1st? What is the ranking of the cubes lightest (1) to heaviest (10)? Is it true that the cube with the most mass …

Asexual Propagation Lab Report

Asexual Propagation is the process of using plant materials such as the stems, leaves, and roots to multiply the number of plants. These plants eventually grow to be a brand new plant that is genetically identical to the parent plant it came from. In several types of plants, asexual propagation is the fastest means of …

Titration Lab Report

Titration Lab Introduction The purpose of this lab is reach and be able to calculate the equivalence point when we use titration to neutralize a base with acid. The process of the lab was determining the volume of a solution needed to react with a given mass or volume of a sample is called titration. …

Lab Report

Design and preparation of buffers effective at different pHs Abstract These experiments aimed to determine the optimum pH ranges various buffers are effective and provide opportunity for the use of the Henderson-Hasselbalch equation to prepare a buffer of a specific pH. Three different buffer systems were initially investigated; volumes of weak acid and weak bases …

Bio lab report

Abstract: In the Biology Laboratory Manual by Darrell S. Vodopich and Randy Moore are results to a similar experiment. The studied the hypothesis of carbon dioxide production by yeast fed sugar is not significantly different than the carbon dioxide production by the yeast fed in protein. Their hypothesis is the one that has helped formulate …

Fluid Mechanics Lab Report

University of Bahrain College of Engineering Department of Civil Engineering and Architecture Fluid Mechanics CENG231 Osborne Reynolds Demonstration Sayed abbas Mohamed 20104762 03 1. Objective: To reproduce the classical experiments conducted by Professor Osborne Reynolds concerning fluid flow condition. 2. Theory: Reynolds number, Re is the internationally recognized criterion denoting fluid flow condition. “ Re …

Lab report on enzymes

Enzymes What Are Enzymes? Substances that speed up chemical reactions are called catalysts. Organic catalysts are called enzymes. Enzymes are specific for one particular reaction or group of related reactions. Many reactions cannot occur without the correct enzyme present. They are often named by adding “ase” to the name of the substrate. Example: Dehydrogenases are …

Lab report: antioxidants

Introduction             Antioxidants are free radical scavengers and are a diverse group of chemicals that can be naturally found in vegetables, fruits and plants in general. Antioxidants are also synthesized in our body. The main characteristic of an antioxidant is its ability to trap free radicals. Highly reactive free radicals and oxygen species are present …

Unknown Lab Report

Unknown Lab Report Dr. Nathan Cahoone Microbiology 204 December 9, 2010 Introduction There are many reasons for knowing the identity of microorganisms. The study and test was done by applying all of the methods that have been learned so far in the microbiology laboratory class for the identification of an unknown bacterium which I was …

Lab Report on Photosynthesis

Lab Report: Understanding Photosynthesis Gen Biology Lab Abstract: This lab was called photosynthesis: understanding photosynthesis. It is a highly complex process that needs to be broken down in many steps to understand how it works. This lab covers the big components in photosynthesis including carbon dioxide intake, light consumption, and varying pigmentation. Introduction: Photosynthesis is …

Evolution Lab Report

I investigate the finch’s beak. Beak size is a trait that affects survival. Birds with small beaks are more efficient at utilizing small soft seeds whereas birds with large beaks are better at utilizing large hard seeds. Therefore, when more small seeds available, birds with small beaks would have a higher rate of survival than …

Sieve Analysis Test Lab Report

Aggregate is one of the basic constituents of concrete. Its quality is of considerable importance because about three-quarter of the volume of concrete is occupied by aggregates. One of the physical properties of aggregate that influence the property of concrete is the grading of aggregate. The grading of aggregate defines the proportions of particles of …

Bio Lab Report

Lab Report Microscopic Study: Investigating Osmosis in Red Blood Cells Lab Report Investigating Osmosis in Red Blood Cells Introduction: The flow of water across a permeable membrane is called osmosis, and during this process, water moves down its concentration gradient. A solution surrounding a cell is hypertonic if it contains more solute particles than the …

Chromatography Lab Report

Using Chromatography to separate Kool-Aid solutions and visible spectroscopy to measure light passing through Date of Experiment: September 18, 2013 Abstract: Homogenous mixtures can come in the form of colored solutions, like the one used in our experiment, which was Kool-Aid. The fact that it’s a homogenous mixture means that it is thoroughly mixed. Chromatography …

Osmosis Lab Report

Natasha Tenen Lab: Thursday (3-6 pm) OSMOSIS LAB REPORT INTRODUCTION Osmosis is a special type of diffusion where water molecules move down a concentration gradient across a cell membrane. The solute (dissolved substance) concentration affects the rate of osmosis causing it either to speed the process up or slow it down. Based on this, how …

Molar Mass of a Gas Lab Report

————————- ————————————————- ————————————————- Abstract: ————————————————- ————————————————- The aim of this lab was to determine the volume of one mole of hydrogen gas at STP (standard temperature and pressure). In the experiment, a magnesium ribbon was placed at the bottom of an eudiometer tube and allowed to react with 2M hydrochloric acid. The volume of hydrochloric …

Lab Report Y on Chemistry 2315

Lab report# Y SN1 and SN2: An Introductory Lab 1. Goals of this Experiment For this experiment, we could gain experience with the relative rates of nucleophilic substitution and different alkyl halides structure. we can learn set up and analyze a small-scale preparative reaction. Know the mechanism of SN1 and SN2. Learn to use infrared …

Lab Report

Purpose To check whether mass is gained or lost during a Chemical reaction. Hypothesis Equipments and Materials •Eye protection •Test tube •250 ml Erlenmeyer flask and stopper •Weight Balance •Antacid tablet •Dilute solutions of oSodium Hydroxide, NaOH(aq) oIron(III) Nitrate, Fe(NO3)3 •Funnel •Cylinder Procedures 1. Put eye protection on for safety purposes. Part A: Reaction between …

Unknow Lab Report

Introduction The purpose of this lab was to identify unknown bacteria cultures using various differential tests, and my unknown bacteria is #17. The identification of these unknown cultures was accomplished by separating and differentiating possible bacteria based on specific biochemical characteristics. Whether the tests performed identified specific enzymatic reactions or metabolic pathways, each was used …

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