Solubility

In our consumer-driven society the analysis of unknown compounds can prove to be dire due to the fact that some compounds are determining the life or death of different drug and food buyers. In this lab, confirmation and elimination test were conducted to figure out the identity of the cation and anion of an unknown ionic compound. The results of each test provided “clues” to the identity through the use of logic trees constructed in parts 1 and 2 of the lab. Materials and methods PART ONE: Elimination

Selena Tran Chem 4A Lab Section 401 Formal Lab Report 1 09/21/2017 Gravimetric Analysis of Sulfate Formal Lab Report Abstract:     Three measures of unknown sulfate salt was measured and placed into three beakers with water, Hydrochloric acid, and Barium Chloride. The solutions were heated until Barium Sulfate precipitated and the solutions were filtered through ashless filter papers to collect the precipitate. The filter papers were combusted until only the BaSO4 remained, and the precipitates were

NMR spectroscopy is a powerful analytical tool used for studying both structural and chemical information about the sample. When it is implemented for metabolomics studies NMR provides several advantages. Firstly, NMR-based metabolic profiling can be highly quantitative and reproducible. This is extremely helpful when multivariate analysis are usually performed in metabolomic analysis (Nicholson and Wilson 1989). Furthermore, NMR sensitivity is hardly affected by metabolite pKa or hydrophobicity

Chapter Five Discussion Extraction is a process by which substances and active constituents are separated from the original matrix, extraction process depends on many physical and chemical characteristics. Extraction is divided into two types liquid phase extraction and solid phase extraction depending on the physical phase of extraction agent(Rezaee et al., 2006). In our study, we have adopted liquid phase extraction for several reasons. Firstly, simple, inexpensive, relatively precise and wide

Arsenic has an atomic number of 33 and a relative atomic mass of 74.922amu. Arsenic is an odd element, as it acts like metal even though it is a natural element. Arsenic is found in natural environments, and in limited quantities found in rocks, soil, water and more. Arsenic was very known to the ancient Egyptians and the Chinese, they used Arsenic as a way of gilding metals. The orpiment(As2S3) and the realgar (As4S4) : are the two Arsenic sulphide minerals that Greek Philosopher, Theophrastus

In this lab an unknown metal cation is identified by comparing chemical reactions of known metal cations with different ions to chemical reactions of the unknown with those ions.Nine different metal cations are reacted with sulfate, iodide, carbonate, hydroxide, and ammoniaand observed. A procedure is then planned using the original tests to identify the unknown metalcation. The nine different metal ions, aluminum, barium, cobalt, copper, iron, magnesium, manganese, lead and zinc, were reacted with

The purpose of this lab was to be able to identify the factors that contribute in allowing carbon dioxide to exist as a solid, liquid, and gas. By performing this experiment, we were able to have a better understanding of the three phases being in equilibrium with each other. In its natural state, carbon dioxide exists as a solid. In order to exist as a liquid, the pressure required to make this phase change must be at minimum 5.11 atm. Once the solid carbon dioxide melts, the triple point is achieved

Question of the day: What factors correlate to the time it takes for polyethylene glycol 3350 to dissolve? Hypothesis: Dissolve time has a direct negative correlation to temperature. Experimental Method: Polyethylene glycol 3350(PEG) was placed in water in order to measure the amount of time it took for the PEG to dissolve. The amount of both PEG and water were the same for each trial, the only changing factor was the temperature of the water. Timing started the moment PEG was placed into water

Act 1 Pure Substance Demo What is a pure substance? The definition of a pure substance is a substance that is made up of only one particle. For example water and sugar are pure substances. In a pure substance, the particles are always the same and are evenly spaced. Act 2 Solute and Solvent Demo What are solutes and solvents? The definition of a solute is a substance that dissolves into another. It is a component in the solution. The other component in the solution is the solvent. A solvent

The Effect of Solvent on the Ability of Solute to Dissolve Problem: How does the solvent effect the ability of a solute to dissolve? Hypothesis: If the solvent is denser, than the time it takes the sugar to dissolve will decrease. Materials: Sugar Rubbing Alcohol Vegetable Oil Water Scoopula Beaker(200mL) Graduated Cylinder(50mL) Stirring Rod Balance Stop Watch Medicine Cup Procedures: 1. Measure 25mL of water into a graduated cylinder. 2. Pour the water into a beaker. 3. Measure 2g of sugar