To perform this experiment, we will utilize emission spectra, titrations, and thermal gravimetric analysis, using knowledge from Experiments 10, 4, Titrations of Na2CO3 and NAHCO3 by HCl (hydrochloric acid) will be performed to determine the concentration of HCl, as well as the number of moles of HCl present within the sample of baking soda. As a result, we will be able to determine the molar concentration of HCl by determining its equivalence point (the point on the graph where the exact amount of rectant needed to perform a reaction has been added) from graphical analysis. Na2CO3(aq.) + HCl(aq.) ==> NaHCO3(aq.)
We are performing the experiment to gain our spots on the team of quality control for the Athenium Baking Soda Company. The purpose of the quality control is to determine the quality and safety of use of the baking soda. The theory behind thermal gravimetric analysis is that when a mixture is heated to a sufficiently high temperature, one component decomposes to form a gaseous compound while the other does not decompose. The mass is measured before and after the heating and stoichiometric ratios are used to determine the percent by mass. The chemical equation to be used is : 2NaHCO3(s) Na2CO3(s) + CO2(g) + H2O(g) In the second part, 1.0 M HCl will be titrated into a solution with a known amount of sodium carbonate (Na2CO3), the pH will be measured as it becomes more acidic and the equivalence point (the point at which HCL and Na2CO3 reach equilibrium) determined.
This standard was formulated for the purpose of implementing the Environmental Protection Law of the People’s Republic of China, Law on the Prevention and Control of Water Pollution, Decision of the State Council on the Implementation of the Outlook on Scientific Development and Strengthening Environmental Protection and Opinion of the State Council on Preparing the Plan on National Major Function Zones, protecting the environment, preventing and controlling pollution, strengthening control and management of waste water discharge from citric acid industry and regulating environmental impact assessment of companies of citric acid industry. The standard provides the discharge limit of water pollutants, requirements on monitoring and supervision of citric acid companies. To facilitate balanced development of regional economy and the environment, promote industrial restructuring and transformation of economic growth model and chart the course for the development of industrial production process and pollution control technology, the standard defines special discharge limits for water pollutants. Note: both the United States and china have formulated standards to guard against environmental hazards. Riordan manufacturing will have to be aware, adopt and follow both the Chinese and the United States environmental standards since it’s involved in international trade.
To get the right result for solution reaction to occur, it is base on the measuring liquid for each solution. You need to pour the right amount of each solution so you can determine the result of solution reaction (product) will occurs accurately. If you pour your solution (liquid) into a beaker not at the right point than you can’t find the result of solution reaction (product) accurately. You need to put a lid on top of a weighing bottle because you don’t want your solution to spill out and other stuff (oil, dirt, sweat) will get into a weighing bottle that can cause the mass is not accurate and not
Introduction Seemingly basic chemistry principles established long ago are still crucial to understanding the more complex procedures in use today. Proportional reasoning is an old technique which will be demonstrated in this experiment. In addition to practicing procedure design, observing chemical reactions and applying proportional reasoning to mass and volume measurements, we will investigate chemical stoichiometry. The methods by which this will be accomplished are measuring concentrations to determine the mass to volume ratio to which an observable chemical reaction occurs between metal carbonate and an acid solution. Techniques to be practiced are: analytical balance, weighing by difference, volumetric glassware and significant figures.
Perform tests of controls and substantive tests of transactions. Before the audit team can safely reduce planned assessed control risk, they need to test the effectiveness of the controls (Arens, Elder, & Beasley, 2012). One control that can be tested for SDF is the inventory, all inventories, but specifically returned inventory. The best way to test this control would be to physically count the inventory and compare it to what the invoices say there should be. This will satisfy the existence objective.
Experiment and Observation: Please note that this procedure was adapted from the “Anions, Cations, and Ionic Reactions” LabPaq Lab manual (Hands-On Labs Version 42-0304-82-00-01, 2015) Please reference this manual for further information on the lab experiments. The first experiment was to perform a qualitative anion test. This was done by observation of chemical reactions and recording the results in Data Table 1. Using the information from the reactions we were able to identify unknown substances and recorded the results in Data Table 1. Data Table 1: Anion Confirmation Tests Chemical | Anion | Addition of AgNO3 | Addition of HCl | NaBr | Bromide | Cloudy white thin solution | Clear with sedimentation | Na2CO3 | Carbonate | Clear with white sedimentation | Bubbles, sedimentation combined to one formation | NaCl | Chloride | Milky white, white sedimentation | No visible change | Nal | Iodide | Pale green cloudy, sedimentation | Sedimentation dispersed to smaller pieces, solution clears in color | Na2SO4 | Sulfate | No visible changes noted | Milky white | Na2S | Sulfide | Clear with amber sedimentation | No visible Change noted | Unknown #103 | CarbonateNa2CO3 | Cloudy white thin solution | Bubbles, Sedimentation combined to one
We’re specifically looking into how much product will be created after conducting experiments with various different concentrations of Iodine and Zinc. One of the things we tested for was the production of a “white solid” which acted as our precipitate. Another key element we kept an eye out for was excess zinc, which showed us how much of the zinc was reacted. During our experiment we colleged exactly the amounts we needed for our group, no decimal point less! We also collected an accurate amount of acidified water, used to start the reaction.
CALIFORNIA COSMETOLOGY PRACTICAL EXAMINATION CANDIDATE INFORMATION BULLETIN Please visit www.barbercosmo.ca.gov for the most current bulletin prior to testing. This bulletin contains important information regarding the NIC National Cosmetology Practical Examination content and administration. Please review all information carefully. Chemicals for Chemical Waving, Virgin Hair Lightening, Hair Color Retouch, Virgin Relaxer Application and Relaxer Retouch will be simulated. Manufacturer’s labels are required on all disinfectants and sanitizers.
Purpose The Purpose of this lab is to observe and discover how different chemicals and substances react with each other and how their physical and chemical properties change. Procedure Before beginning the experiment, I reviewed the instructions and the goals of the experiment and re -reviewed the safety procedures when conducting lab experiments After I prepared myself with the requirements, I laid out each item that was needed to perform the experiment- test tubes, bunsen burner, 100-Ml Glass Beaker, Stirring Rod, test tube clamp holder, cleaning brushes, 24 well plate, 96/well plate, blue litmus paper, red litmus paper, Copper (II) Carbonate, Copper (II) Nitrate Crystals, Copper Metal, Magnesium, Magnesium Oxide Powder, Sodium