Sodium thiopental

The Calorimetric Determination of Enthalpy and Entropy Changes of the Thermal Decomposition of Sodium Sulphate Decahydrate Abstract Sodium sulphate decahydrate thermally decomposes to anhydrous sodium sulphate at 50⁰ C and cools to form anhydrous sodium sulphate. Using Hess's Law the enthalpy and entropy changes of this process can be determined in order to deduce the spontaneity of the reaction. The transition temperature was determined by melting the hydrated crystals at 50⁰ C and allowing…

Most people who watch crime dramas (Law & Order, NCIS, or CSI) on TV know what the cops do when they’re at a crime scene. When cops are investigating a crime scene, they spray a special type of solution involving the chemical Luminol that glows blue in the dark. The topic of this experiment is to determine what other liquids can react with Luminol to make the solution glow blue in the dark. The independent variable would be the types of chemicals used (in cups) and the dependent variable would…

3-(4-acetylphenyl)-6-bromo-2-(4-chlorophenyl)quinazolin-4(3H)-one (2) Compound 1 ( 0.01 mol) fused with p-aminoacetophenone ( 0.01 mol) at 160 oC in an oil bath for 2 h. Crystallized from ethanol to give redish brown crystals of 2, m.p. 210oC in 80% yield. Analysis for C22H14BrClN2O2, Calcd.: % C, 58.24; H, 3.11; N, 6.17, Found: % C, 58.31; H, 3.17; N, 6.20, IR spectrum (KBr, cm-1) showed characteristic absorption bands at 3380 (C-H aromatic), 1710 (C=O of acetyl), at 1690 (C=O of…

Creating food: Before making the food, make sure to wash your hands thoroughly. After washing your hands, make sure to wipe down your station before using it. There are alcohol spray bottles throughout the lab. Spray it in your area and use the paper towels to wipe it down. Obtain a clean polystyrene vial and fill one eighth of the tube with dry food. The fly food was purchased from the Carolina Biological Supply company. Add about 9 ml of water to the dry food and gently roll the vial five…

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…

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…