Sodium thiosulfate

As it can be seen the concentration of the phenol compounds decreased as the hydrogen peroxide increases. The presence of the anions decreases the rates of the phenolic compounds, the sulfates influence in a smaller degree. For phenol and 2-nitrophenol the difference in slope or degradation rates for chloride and sulfate are 0.71 and 0.55, and only 0.16 for 2-chlorophenol. The presence of chloride inhibits in greater proportion the formation of hydroxyl radicals than the sulfate , this can be…

There are so many chemical reactions and it is important to classify a chemical reaction to understand the reaction and predict the products. In this lesson, we will discuss the definition and go over examples of a combination reaction. !!!What is a Combination Reaction? Putting furniture together, combining ingredients to make something delicious – these things can be fun activities and we look forward to the results. Each individual component is not very exciting by itself. However, if we…

Student number: s3333523 Email-address: lidiapalha@gmail.com Name of demonstrator: H.Helbert Reaction Equation Summary Salicylamide and sodium iodide are dissolved in ethanol, and stirred and cooled to 0. After that household bleach was added while stirring vigorously, solution changed from colorless to pale yellow. Sodium thiosulphate and hydrochloric acid were added aswell. Product collected by vacuum filtration and recrystallized from 96% ethanol. IR- and H-…

In part one the Styrofoam cups and the substances that are in the cup which is distilled water and sodium hydroxide was the system while the stir rod and thermometer and the Vernier unit is the surroundings. In part two the Styrofoam calorimeter, HCl and NaOH are the system while the stir bar and the tool that is used to measure the temperature is the surroundings. In part 3 HCl, Styrofoam cup calorimeter and NaOH are the system while the temperature probe, stirring rod are the soundings 6.)…

Checking your car's battery is an extremely important part of car maintenance. If you keep your battery clean and running in tip top shape, it will last much longer. When checking your battery, you should look for problems like corrosion, dirt, cracks, and broken cables. It's important to be cautious when working on your car's battery. You should always make sure the engine is off and you are removing the battery and its cables correctly so that you don't cause harm to yourself or the battery.…

of this investigation is to investigate how changing the temperature of sodium thiosulphate affects the rate of reaction in a chemical reaction. In order to complete this practical the temperature will be changed three times and the rate of reaction will be measured each time. Variables: Independent: -the temperature of the sodium thiosulphate. Dependent: -the rate of reaction. Controlled: - concentration of the sodium thiosulphate. - concentration of the hydrochloric acid.…

Introduction: DNP and research question The organic compound 2,4-dinitrophenol (DNP) is a crystalline solid with the molecular formula C6H4N2O5. The molecule is soluble in water to some extent and is fully soluble in sodium and potassium hydroxide solutions. The compound can also be explosive. It is usually used in dye, weed killers, wood preserver, photographic development among other things and it has even been used as a weight loss agent. In fact, it has been claimed to be the king of the…

in water. Back titration is a reverse method of titration used to obtain unknown concentration of analyte. A roughly weighed quantity of toothpaste? calcium carbonate is dissolved in a known amount of hydrochloric acid and is then titrated against sodium hydroxide. An orange colour will be observed at the end point. This experiment is a success as two results obtained from the experiment were relatively close furthermore, an average of 21.50% of calcium carbonate obtained is close to the…

This week's reflection assignment consists of one video. It features Mr. Larry Potterfield (founder, and CEO of Midway USA) as the presenter. The video is titled "Gunsmithing: How to properly polish the metal parts on a Remington 700". Mr. Potterfield begins his first video by stating the objective, polishing metal parts. In his hands, he holds the barrel of a Remington 700 series rifle. It appears as if the rifle has definitely seen some cleaner days, in my opinion. This is a skill every…

Hair is made up of different layers and structures. It is the tough protein keratin that forms the strength of your hair, nails and the outer layer of skin. Keratin is a large molecule made up of smaller units called amino acids, which join to form a chain. The hair shaft is formed of three layers the medulla, cortex, and cuticle. The medulla is the deepest layer of the hair shaft, only seen in large and thick hairs. The cortex is the middle layer of the hair shaft which provides the strength,…