Lab 6.C Hypothesis: If enzyme activity is affected by the pH of a solution‚ then the enzymes will experience the greatest activity at a pH of 6. Variables: Independent Variables Dependent Variable Controls Four different pH values (10‚ 7‚ 6‚ and 3) Change in color of the solution The amount of potato extract‚ pH solution‚ and catechol used (1 cm +/- .1cm) Size of the test tubes Amount of time allowed for the catechol to sit with the potato extract and pH solution (20 minutes with 5
Premium PH
Alexis Becker Pre-Lab Experiment 7 Avinash Pallagani Investigating Stoichiometry with sodium salts of carbonic acid 4/2/14 A summary of the concepts: The purpose of this lab is to better understand “stoichiometry”. We will be reacting sodium carbonate (NaHCO)3 and sodium carbonate (Na2CO3) with hydrochloric acid to produce sodium chloride‚ water‚ and carbon dioxide. The balanced chemical reaction looks like this: NaHCO3 + HCl = NaCl + H2O + CO2 CAUTION: Be especially
Premium Hydrochloric acid Sodium bicarbonate Sodium
Example lab report of Synthesis of potassium tris (oxalato) ferrate (III) trihydrate Posted by Nurul Yunaliyana Experiment 5: Synthesis of potassium tris (oxalato) ferrate (III) trihydrate Purpose: to synthesis potassium tris (oxalato) ferrate (III) trihydrate ‚K3 [Fe (C2O4)3].3H2O. Introduction: Ferrous ammonium sulfate‚ Fe(NH4)2(SO4)2.6H2O is dissolved in a slightly acid solution‚ excess oxalic acid‚ H2C2O4‚ is added and the following reaction takes place: Fe(NH4)2(SO4)2.6H2O + H2C3O4
Premium Chemistry Iron Ammonia
Abstract The purpose of this lab was to test if ethanol affects the reaction involving hydrogen peroxide and catalase. Tests were performed by putting chicken liver‚ ethanol solution (diluted ethanol solution for other trials) and hydrogen peroxide in a test tube with a side arm‚ and having a rubber tube lead the oxygen gas into a gas collection tube. Results from the tests showed a negative correlation‚ this means that the more diluted the solution of 95% ethanol was‚ the less oxygen gas collected
Premium Oxygen Hydrogen peroxide Enzyme
energy. When the molecule transitions down in energy‚ it usually is released as heat. Conversely‚ if the molecule is subject to high energy the molecule can transition down to its ground state by fluorescence. This emission of a photon creates wavelengths that are captured by spectrophotometric methods. Fluorescent intensity is represented by the equation F=k C. Where F is
Premium Spectroscopy Photon Atom
record a thermogram. YOU CAN NOW MOVE ONTO THE STEPS TO RECORD AND DETERMINE THE CALORIMETER CONSTANT FOR EACH OF THE 4 PROVIDED CUPS. 1. Obtain two of the same cup types‚ in example two styrofoam cups‚ and a lid from your instructor or the lab stock room to serve as the calorimeter. Nest one cup inside the other to construct
Premium Laboratory equipment Temperature
№. 17 Refrigeration Cycle Analysis ~~~~~~~~~~~~~~ Lab Partners: Name Name Name Name Name Name Section № Experiment Time/Date: Time‚ date ~~~~~~~~~~~~~~ OBJECTIVE—of this exercise is to determine the various coefficients of performance‚ COP. Specifically‚ these are the ideal and actual cycle COPs using the attached thermodynamic diagram for Refrigerant-12 (R12). INTRODUCTION—A refrigeration cycle is a cycle which transfers heat from a low temperature sink to a high temperature sink
Premium HVAC Air conditioning Humidity
Daphnia and Additives Lab Purpose The purpose of this lab is to test what effect of Nicotine‚ Acetylcholine‚ Epinephrine‚ Caffeine‚ and Ethanol on an organism’s heart rate. Materials * Microscope * Eye dropper * Pipet * Cotton balls * Depression slide * Beakers * Daphnia * Water * Five additives: Nicotine‚ Acetylcholine‚ Epinephrine‚ Caffeine‚ Ethanol Procedure 1. Put on safety goggles. 2. Catch a living Daphnia. 3. Transfer to a depression
Premium Acetylcholine Parasympathetic nervous system Epinephrine
In the short story‚ “August Heat‚” W. F. Harvey uses imagery‚ point of view‚ and structure to build intensity‚ and to show how humans cannot control nature. The first person point of view shows how James’s attitude changes over the course of the story. At the beginning‚ James states‚ “I am forty years old‚ in perfect health‚ never having known a day’s illness.” Later in the story‚ James had a‚ “sudden impulse‚” to enter the monumental maker yard. James just deciding to enter the yard brings attention
Premium
chemicals before use. Abide by specific warnings and directions. 3. Collect all materials needed for a procedure before proceeding. 4. Perform reactions under the hood when directed. Chemicals may be weighed and prepared at balance or lab tables‚ but tests should be carried out under the hood. 5.Acids and caustic chemicals are stored in the hood. Please do not take these chemicals from the hood. Procedure: PART 1: Metathetical reactions Precipitation reactions A1. Add a
Premium Chlorine Chemical reaction Sodium