types of glassware are the most accurate and precise in measuring substances. Another goal of this experiment was to help familiarize ourselves with the different types of glassware, and how we should handle the laboratory equipment. The accuracy and precision of a particular type of glassware is important because it allows for accurate measurements when performing different experiments. It also allows us to differentiate between glassware that is better for containing substances versus glassware that
Jonathan O’Donnell CHM 3120C 05/15/2014 TA: Darrell Cerrato Lab 1. Volumetric Glassware Calibration Introduction: This experiment is designed to educate proper techniques for using an analytical balance and volumetric apparatus’s. Accuracy in volume measurements are significant in analytical chemistry but all volumetric glassware have errors and obscurities linked with the measurements observed. Miniscule damage in a glassware due to aging, abuse and chemicals can create systematic errors in the observational
found to be 9.190±0.836, with an accuracy of 2.567%. The difference in density measurements could be due to human error or temperature differences. Background: Previously submitted on D2l. Procedure: Hirko, R. Chemistry 112L General Chemistry I Laboratory, Ninth Edition; bluedoor: Minneapolis, 2015; Experiment 1. Results: Vessel T/°C H2) Mass/g Density/ g/cc V/ mL 50 mL beaker 21.1° 23.454 0.99797 23.502 50 mL beaker 21.1° 24.935 0.99796 24.986 50 mL beaker 21.1° 23.687 0.99797 23.735 Mean
Concentration of a Sample of Sulphuric Acid The purpose of our experiment is to find the concentration of a sample of sulphuric acid accurately. We are provided with a range of indicators, solid anhydrous sodium carbonate and access to all laboratory glassware and equipment. Apparatus needed: - ------------------- Requirements to produce a Sodium Carbonate solution: - ====================================================== Electronic Balance (accurate to 2 decimal places) Goggles
Factors Affecting the Equilibrium Reaction of Iron (III) and Thiocyanate ions Research Question How does the change in temperature of Iron (III) Thiocyanatoiron, containing iron (III) ions Fe3+ (aq) and thiocyanate ions SCN¬¬- (aq), affect the absorbance of the solution? - Temperature at 25 °C, 30 °C, 35 °C, 40 °C, 45 °C, 50 °C, 55 °C, and 60 °C (equilibrate the Iron (III) Thiocyanatoiron (aq) in various temperatures using a digital water bath, and temperature checked using a digital thermometer
Titration Practical Planning assessment The apparatus to be used: · Beaker · 250cm 3 volumetric flask · Funnel · Burette · Pipette · White tile · Conical Flask · Balance · Spatula · Weighing bottle · Glass rod Method Making a standard solution: A weighing bottle was accurately weighed and approximately 5g of anhydrous sodium carbonate was added and the weight of the bottle plus the solid recorded. The anhydrous sodium carbonate was then transferred
Introduction Coordination complexes are metals that can accept electron pairs to form coordinate bonds without affecting the charge of the metal. The species that donates its paired electrons is called a ligand. Counterions are not part of the compound but balance the charge of the coordination sphere, the metal and ligands. These compounds are known for their very bold colors and their ability to enhance solubility. In this lab a coordination compound will be formed from Equation 1. (Equation 1)
Finding the Concentration of Calcium Hydroxide by Titration with Hydrochloric Acid. The Problem Perform a titration upon Calcium Hydroxide to find the concentration by using Hydrochloric Acid of 3 different concentrations as following 2 molar, 0.5 molar and 0.1 molar. In order to calculate the results must be within 0.05cm3 of each other. Apparatus Burette Volumetric Pipette Beakers Conical Flasks Volumetric Flasks Funnel Clamp Stand White Tile Fair Test
Finding the Solubility of Ca(OH)2 Aim: ---- To determine the solubility of Ca(OH)2. To carry out the aim of this experiment an experiment needs to be planned and carried out. I am given the information that the solubility of the Ca(OH)2 is between 1 to 1.5g per dm3. Also I am given a standard solution of 1M hydrochloric acid (HCl) which may have to be diluted to suit the measuring needs of the experiment. Apparatus: [IMAGE] * 1g of Ca(OH)2. * Pipette 25cm3 * 2 x 500cm3
The Formula of Succinic Acid Succinic acid is a diprotic, which means it donates two protons per molecule. Succinic acid can be completely neutralised by sodium hydroxide. The indicator most suitable for this experiment is phenolphthalein, it is colourless in acids and pink in alkalises. The half way stage is about pH 9.3, this is when it will either change from colourless to a very pale pink or from pink to colourless. To determine the relative formula mass of succinic acid I am going to
The Determination of the Solubility of Calcium Hydroxide I have to plan an experiment to find the solubility of calcium hydroxide, Ca(OH)2, in water. I have to make up a solution of calcium hydroxide and carry out a titration using hydrochloric acid solution of the chosen concentration. The equipment need is as below: · Solid calcium hydroxide · Methyl orange indicator · Volumetric flask (250cm3) · Clamp and boss · Clamp stand · Burette (50cm3) · Conical flask ·
Finding the Exact Concentration of Sulphuric Acid in a Solution Through a Titration Aim: To find the exact concentration of sulphuric acid in a solution through a titration. The titration is between sulphuric acid and sodium carbonate has to be in liquid for in order to carry out the experiment so it is dissolved into distilled water to a concentration of 0.1 mol dm³ Introduction- ------------- During the extraction of a metal from its ore, sulphuric dioxide is often produced. This
Chemical Analysis of Preparing a Solution of Sodium Chloride One of the most common practices in the laboratory is accurately to prepare chemical solutions in the laboratory. I was given the task to prepare a one mole solution of sodium chloride for a precipitate experiment. The solution must be at a high level of accuracy to make sure the experiment works next week. Safety Points Sodium Chloride · Wear safety goggles · Do not eat · Use smallest amounts possible on a
Our hypothesis is that we believe, the test tube that has potato extract alone in it will have the darkest brown color, thus it will have the highest absorbency. The reason we believe this hypothesis is true is because, darker the color of the mixture, more light will be absorbed and also because it did not receive any pH which can make the mixture lose it’s ability the catalyze reaction. This experiment is designed to investigate and compare, how the enzyme catecholase from potato extract reacts
Methodology: The agar-well diffusion method was employed for determining the antibacterial activities using the following sequential processes: 1. Preparation of Agar containing Petri Dishes: Standard laboratory beaker was thoroughly cleaned and dried before any use. 100ml of tap water was poured into the beaker. The hot plate was switched onto number 1 and left for three minutes to prepare for heating. At the end of three minutes the beaker containing 100 ml of water was placed on hot plate. The
Introduction During this week’s lab, both the cis and trans enantiomers of 2-methylcyclohexanol will be produced through the reduction of 2-methyclcyclohexanone with sodium borohydride. Once the product is formed, NMR signals are used to examine the product of this reduction by observing the cis and trans location of the CH2OH group. The integration of the signal will then be examined and to show the ratio of cis and trans product that is formed through this reaction. Experimental Procedure
With the addition of Natron as a herbicide to control weeds, there are concerns that the runoff could affect the growth of other plant life. The purpose of this lab is to test the toxicity of Natron as well as the max dosage that will still allow for beans to grow in the presence of the herbicide; We hope to find out the LD50, the toxicity in comparison to Anubis, as well as the germination rate of exposed the beans. We hypothesized that increased concentration of Natron would lead to a decrease
A bath was prepared using a 400 mL beaker filled halfway with water. The bath was then sat on a hot plate and lest to boil. 2g of salicylic acid was placed in a 125 mL Erlenmeyer flask with 3 mL of acetic anhydride, and 3 drops of concentrated sulfuric acid. The solutions were mixed and placed in the boiling water bath. The solution was left in the boiling bath for 30 minutes. The 125 mL Erlenmeyer flask was removed and placed on the side to cool to room temperature. Once cooled the solution was
My Topic: The topic that I decided to do was the Fruit juice production and enzyme recovery. This will include things such as what concentration of pectinase will allow for a greater yield of fruit juice. What is the optimum temperature at which the pectinase enzyme can break down the Apple the most effectively? Sub Questions: • What is the optimum temperature where pectinase will work the most effectively? • What concentration of pectinase enzyme will be most effective in producing a greater yield
Extraction is a separation method that is often used in the laboratory to separate one or more components from a mixture. Sucrose was separated at the beginning because it is the most immiscible and it’s strongly insoluble. Next Acetylsalicylic Acid was separated which left Acetanilide alone. Variety steps could have