Chemical tests

Overview: A fair test is conducted to determine how much bicarb soda is needed to extinguish a tea-light candle when mixed with vinegar. When bicarb soda and vinegar are mixed together a chemical reaction is made thus extinguishing a lit candle, the candle is blown out as bicarb soda and vinegar creates carbon dioxide. A candle needs oxygen to burn, however when carbon dioxide is poured above the flame the candle will quickly be put out, as carbon dioxide is a heavier gas. Aim: To…

Table 1 provides the initial and final masses of crude and pure benzil and benzilic acid. Table 1 also shows the percent yield of each of these compounds. Table 2 provides the melting point results from the DigiMelt apparatus, which were used to test the purity of the experimental products. The percent yield of the crude product of benzil was calculated to be 73%. The melting point of the crude product of benzil was 82.0-86.2˚C, with a range of 4.2˚C. After evaluation of the high percent yield…

The test…

saved. But there are various medical considerations that might come while applying chemical peels and you must consider all of them without any fault. If necessary, then doctor’s consultations can also be taken so that you can remain at the safest end. There are some specific strategies that need to be followed in details so that future complications can be avoided and you can get a glowing skin. How to apply chemical peels? • Taking proper skin preparation is necessary so that you can start…

This was because they were the same chemical compound. Analysis: Summarise the results obtained for each halogen. Potassium Chlorine and Chlorine had no reaction. Potassium Chlorine and Bromine changed the colour to a light yellow colour. Potassium chloride and iodine changed the colour…

chemistry has its many areas of study which are broken down into five individual branches. Analytical chemistry attempts to determine the exact chemical compositions of substances through the measuring the physical and chemical properties of matter. Physical chemistry is the combination of chemistry and physics analysing the physical make up of chemical properties and the interactions between energy and matter. Organic chemistry, is heavily based on the element of carbon and its relation with…

of 1M HCl extract of Antigonon Leptopus The results of the preliminary phytochemical screening are given in Table 1. The extract was found to contain alkaloids, terpenoids, Flavanoids,glycosides, Steroids and saponins. Phytochemical screening tests of the AL extract matches with the earlier work done by Johnson Marimuthu @ Antonisamy et al (2012). Table1Preliminary phytochemical screening of HCl extract of AL Plant AL Tannins - Alkaloids + Triterpenoids + Glycosides + Flavanoids +…

solution in the measuring cylinder, thus the volume of hydrogen peroxide could have been below or above the 5mL mark due to parallax. This would affect substrate concentration if volumes in test tubes were inconsistent, thus some test tubes might have less or more than 5mL of hydrogen peroxide, reducing precision. If a test tube contained more than 5mL, the substrate concentration would be higher, thus may increase reaction rate (Sam Adam-Day, 2014), and vice versa. Increase sample…

“Enzyme Action” we were testing the enzyme reaction with different substrates. In our lab we tested 3 different enzymes and substrates to find out when they are at the highest potential. Enzymes are necessary for life because they keep our bodies chemical reactions at a normal pace. Enzymes have the ability to keep a human body at homoeostasis. In our lab we were finding when the enzyme is the most active while undergoing different temperature, PH, and concentrate. Results: In our first…

What is animal testing used for and why? Animal testing is used and required by the United States government to test the safety of drugs, chemicals, cosmetics, and various consumer products. Additionally, animals are commonly used in the practice of medical and military training. Government agencies that heavily rely on animal testing are the U.S. Military, the U.S. Environmental Protection Agency (EPA) , the Food and Drug Administration (FDA), the Department of Transportation (DOT), and the…