Erlenmeyer flask

Phenolphthalein is often used as an indicator in acid base reactions. The reaction used in this lab is: C_20 H_14 O_(4 (aq))+46 NaOH_((aq))→46 Na_( (aq))^++20 H_2 CO_(2 (aq))+10 H_2 O_((l)). Phenolphthalein and sodium hydroxide react to form carbonous acid, water, and Na+ ions. This reaction is a neutralization reaction, where phenolphthalein, a weak acid, reacts with a strong base, sodium hydroxide. When phenolphthalein is put into a basic solution, it turns pink. The phenolphthalein ion is…

In a similar fashion, Will Rodman contradicts nature by perfecting the drug ALZ-112 which fixes Alzheimer's by attacking the genes of host cells with a retrovirus. However, the study of Alzheimer's has more potential for good than reanimating life does (because curing Alzheimer's displays more realistic potential and a higher likelihood to help a large audience of people). But, Rodman still crosses the fine line that determines science does too much when he starts to treat his specimens like…

Comparing the Absorptivity of Two Sequestration Agents Macy Freireich* & Alekhya Geddan ABSTRACT In this experiment it was decided which sequestration agent, charcoal or magnetic bentonite clay, was more effective at absorbing the PAH model, Procion Red MX-5B. By way of spectrophotometry, the collected absorptivity and concentration values of each of the diluted samples of the Porcion Red MX-5B were graphed and evaluated in comparison to the measured absorptivity of the dye extracted from…

The gels are made of agarose. To begin, we used .48 grams of agarose to prepare 30µl of a 1.6% agarose solution. We then transferred the weighted agarose to a 125-ml Erlenmeyer flask and added 30 ml of 1X TBE buffer. The agarose was then heated in a microwave for 30 seconds, before adding ethidium bromide which will stain the DNA fragments as they move through the gel. After mixing the agarose and bromide, we constructed…

the formation of an azo compound precipitate. The objective was to produce 1—phenylazo-2-naphthol or Sudan-1 and to test the ingrain property of the produced compound as well as the determination of its melting point. II. Methodology A 50-mL Erlenmeyer flask was used to mix 0.2 mL of aniline, 0.35 mL of water and 0.5 mL of concentrated HCl for the synthesis of the phenyldiazonium ion. The mixture was cooled in an ice bath until the temperature reading reached and maintained at about 4°C, with…

Introduction Photosynthesis is the process in which light energy is converted into chemical energy in plants and other organisms (Reece, 2011). Photosynthesis is a redox reaction where carbon dioxide is reduced to sugar (glucose) and water is oxidized to oxygen (Reece, 2011). The reaction that occurs during photosynthesis is shown through the empirical equation CO2 + H2O → (CH2O)N + O2 (Stegenga, 2015). Photosynthesis occurs in the chloroplasts of plant cells, specifically within the thylakoid…

The following tests were performed using Erlenmeyer flasks containing NaCl.² The BioMnOx batch experiments were initiated by adding 150 mL of the buffered test solution to BioMnOx pellets and to the diclofenac stock. The chemical 〖MnO〗_2 batch experiments were initiated by adding the chemical 〖MnO〗_2…

Does the “Five Second Rule” Affect the Amount of Bacteria on Food? Background Information Many people have heard of the “five second rule,” a saying that refers to the common belief that if one drops a piece of food on a floor or other surface, germs will not have time to adhere to the food if picked up within five seconds. This idea is supported by Hilton (2014) who did research and found that “food picked up just a few seconds after being dropped is less likely to contain bacteria than if it…

Extracellular or bacterial cellulose (BC) synthesized by nonpathogenic aerobic bacteria in a culture medium containing carbon and nitrogen sources can be promising biodegradable nanofibers for composite materials because of their excellent mechanical properties [1]. Although BC is chemically identical to plant-based cellulose, it exists in extremely pure form and does not contain any hemicellulose, lignin, pectin or wax materials [2]. In addition, it has higher crystallinity, degree of…

ABSTRACT Vitamin d is organic substance necessary in our diets for growth and development of our body. Vitamin c prevents cancer and cold. Vitamin c is present in citrus fruits . Heating effect on fruit juices were tested how they effcts on ascorbic acid present Deficiency of vitamin c is very rare in western countreis . But it is still liable in alcoholic and drug addicts .whose diet hardly includes vitamin mainly found in poor peopl. Vitamin c is no doubt important for our health but we can…