Sodium sulfate

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…

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 due to some free radicals that are scavenged and the formation of some…

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…

traces of salt (sodium ethanoate and sodium sulfate) and remaining soluble impurities when it is discarded (AUS-e-TUTE. 2015.) Any remaining traces of ethanoic acid and sulfuric acid is neutralised by sodium carbonate (as shown in equation 1) (Fischer esterification reaction), which is converted to soluble sodium sulfate, sodium ethanoate and carbon dioxide which is released by inverting the separating funnel, and opening the tap. Equation 1: Ethanoic Acid + Sodium Carbonate  Sodium Ethanoate…

hydrochloric acid and heat the flame until it glows. Pour about 10 milliliters of 10% sodium chloride solutions into a small beaker and for unknown use 2mL of unknown solution instead of sodium chloride. Dip the clean wire loop into sodium chloride solution and place the loop in the flame and record the observation. Third, potassium flame will be tested. First, clean the wire lop with concentrated HCI for sodium flame test. Pour two milliliters of 10% potassium chloride solution into a small…

A similar experiment such as the reaction of Sodium Thiosulfate and Hydrochloric Acid includes the “Yellow Snowstorm” reaction – a reaction between Copper (II) and Thiosulfate. Copper (II) sulfate [CuSO4·5H2O] dissolves to give cupric ion (Cu2+); in the context of a redox reaction with thiosulfate, the cupric ion acts as an oxidizing agent. Reactions within the temperature on Sodium Thiosulfate and Hydrochloric Acid occur as the result of molecules interacting with each other to create new…

solubility test of the unknown compound determined that the compound was soluble in water (H2O). The other known salts that were tested that were also soluble were all of the sulfates and NaCl. These were the only salts tested, because before this experiment it was determined by the flame test that the compound was a sulfate (explained later). This information means that the unknown compound is polar, because it is soluble in water. This is because H2O, the solvent, is polar, and the solute,…

and 0.3 grams of sodium carbonate was added in. Sodium carbonate prevents caffeine from…