Chemistry Essays

AIM: To determine the amount of glucose in three unknown samples namely A, B and C INTRODUCTION: Biological molecules are held together by covalent bonds, hydrogen bonds among others bonds in various ways to produce large molecules called macromolecules. Simple organic compounds and macromolecules molecules vary in structure and can …

Nasa: National Aeronautics and Space Administration is a government sponsored foundation and has an entire section on their webpage focused on educating today’s youth. The topic of the article is how popcorn pops. The article is an informational one on how popcorn pops. * Popcorn was found on the east …

A commonly used method of separating a mixture of organic compounds is known as liquid-liquid extraction. Most reactions of organic compounds require extraction at some stage of product purification. In this experiment you will use extraction techniques to separate a mixture of an organic acid, a base, and a neutral …

Chemistry has an important role to play in achieving a sustainable civilization on Earth. The present economy remains utterly dependent on a massive inward flow of natural resources that includes vast amounts of nonrenewables. This is followed by a reverse flow of economically spent matter back to the ecosphere. Chemical …

The effect of molecular weight on the rate of diffusion was measured using two tests namely: the glass tube test and the agar-water test. The set-up of the glass tube test used two cotton balls of the same size. One cotton ball is moistened with hydrochloric acid (HCl) and the …

Argon was originally named after the Greek word “Argos,” meaning inactive. Argon’s chemical symbol was just A before it was changed to Ar in 1957. It has an atomic number of 18, and is in Period 3, Group 18. Argon contains 18 protons and 18 electrons with 22 neutrons. It …

Chemistry is the branch of science which studies the characteristics of substances and the changes they undergo when they are mixed one with another. INTRODUCTION TO CHEMISTRY: Chemistry is the branch of science which studies the characteristics of substances and the changes they undergo when they are mixed one with …

Determination of lead and cadmium contents in sausages from Iran A. Abedi a, R. Ferdousi a,, S. Eskandari b, F. Seyyedahmadian a, R. Khaksar c a National Nutrition & Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, P.O. Box 19395-4741, Tehran, Iran ([email protected]) b Food and Drug Control …

-Liquid bromine was placed in a jar and covered Observations: When first placed in the jar the original color of bromine was red-brown. As it began to diffuse its color changed from dark brown to a lighter brown until it becomes a yellow-like orange color. As it was diffusing liquid …

A. Introduction Chelating agent is a compound that combines with metal ions to form stable ring structures. It is used to reduce the concentration of free metal ion in solution by complexing it. From the Greek term “chela” that means “the great claw” of the lobster or other crustaceans, chelate, …