Physical chemistry

Aims of Experiment 1. To extract benzoic acid from the toluene-benzoic acid mixture, using oxidation-reduction reaction (chemical properties) and difference of solubility (physical properties) –Expt. 1 2. To learn how to recrystallize the solid organic compounds well for getting more purified compounds –Expt. 2 3. To find which differences between raw product and recrystallized product are observed. –Expt. 2 4. To determine melting point range of organic compounds with digital melting point…

Steve Huo Richard Williams Physical Science 11/16/2017 Background Research Chemical kinetics is the research of chemical processes which relates to the mechanisms and rates of chemical reactions (Sciencebuddies). The mechanisms describe variations of each molecule during the chemical action such as which bond is broken, which bond together newly, and how the three-dimensional shape of the chemical changes (Sciencebuddies). The rate of the reaction is measuring the speed of the chemical…

The basis of Mendeleev’s periodic table was categorizing the elements according to their physical and chemical characteristics with regard to their atomic weights. Mendeleev was the first to come up with a structure for the periodic table with columns and rows. There were other scientists who have worked on tabulating information of the elements even before Mendeleev, however, he was the first scientist to come up with a periodic trend to predict the properties of elements which were not…

“Classifying Chemical Reactions - Lab Report” I - Introduction - Chemistry is the study of the composition, structure, properties and change of matter. In chemistry, chemical and physical changes are used to help scientists understand how different substances react given various circumstances. A chemical change is any change resulting in the formation of a new chemical substance(s). A physical property is any change that does not involve the chemical makeup of a substance at all. In total…

spread as was his influence. Beyond literature, Lomonosov had a great impact on science through his discoveries. He was a polymath and worked on many different areas including chemistry, physics, astronomy, meteorology, mineralogy, and metallurgy (Vernadsky 38). Most of his earlier career was focused physics and chemistry. His work in physics focused for a period on electricity where he did many experiments with Georg Wilhelm Richmann, a German at the Academy of Sciences. Their work lead…

activity, physical movement, and cellular growth are three bodily examples of reactions simultaneously taking place (P.Minter, 2012). Additionally…

WHAT IS NMR SPECTROCOPY? By definition, NMR spectroscopy is a research technique that makes use of the fact that certain atomic nuclei exhibit magnetic property to determine their chemical and physical properties for various uses that we’ll discuss later. History of NMR Spectroscopy Year Individual Discovery 1921 Stern and Gerlach Basis of quantum theory is confirmed by carrying out atomic and molecular beam experiments 1925 Ulhenbeck & Goudsmith Discovered the concept of spinning…

gaps for un-discovered elements, but modern periodic table has a uniformity. Both of these classifications consider the periodic relationship in properties of the elements. Both, Mendeleev and Modern, periodic tables are used to predict chemical and physical properties of unknown elements. Differences Mendeleev’s periodic table has 8 vertical columns called groups and 12 horizontal rows called periods. The Modern periodic table has 18 columns called groups and 7 rows called periods.…

As a high school chemistry teacher in Silicon Valley California, I am continually striving to find the best methods for instruction for reaching the diverse group of students I teach. Focusing on regular chemistry students come to the class with various levels of reading, writing, comprehension, and even math abilities. Most of these students either didn’t score high enough to enter chemistry honors or have no desire to take it. Included in this are students who have transferred from other…

Robert Crowley Mr. Scott Period 3 October 30th 2015 Chemistry Introduction and Overview Elements are the substances that make up everything in the universe, known and unknown. This means that elements are what make up matter, and everything you see, hear and touch. There are 118 elements known to man, some that you may know include gold, iron and oxygen. Each of these have distinguishing qualities and they come in 3 different states of matter, solid, liquid and gas. Some of these are…