Chemical Changes Essay

Topic/Central Focus: Students will observe and identify what a chemical change in matter is. Students will do this through an experiment and discuss chemical changes as well. It is important for students to recognize and understand what a chemical change in matter is and how it can apply in their lives, such as cooking or cleaning. Prior Student Knowledge: The class is composed of 12 students, with 8 girls and 2 boys. Most of my students are of Hispanic descent. Most of these students speak

Analyzing chemical change Abstract Changes can be chemical or physical in nature. If a chemical change is taking place we will be breaking bonds and forming new bonds and therefore creating a new substance. In a Physical change we will have the same substance but simply in a new form. (Dickinson et al. 197). In order to collect evidence to prove a chemical change is occurring we need a change in the indicators. The more active a chemical is the more likely it will have a chemical reaction with

Chemical and physical changes. Atilio Quintanilla 5B Ms. Gowan Chemistry First let's start with with something simple Chemical Changes most Chemical Changes take place on the molecular level. Chemical change produces a new substance. For example another way you can think of it is that a chemical change accompanies a chemical reaction grat examples of chemical change are combustion in other words burning, cooking an egg is also a great example of chemical change also rusting of an iron

Enthalpy changes in chemical and physical processes- M1 and D1 By sharing electrons, atoms within a molecule that are attracted to one another is called an intramolecular force. Between the molecules intermolecular force, the physical properties for example the melting points and boiling points, relate to the solubility and the strength of these force. Protons are positive components and electrons are negative components. The attractive force that exists between the two is known as an intermolecular

Evidence of Chemical Change Abstract: For the lab, what we did was we had five chemicals to mix. We had a 4x3 spot plate and dropped a small amount of two different chemicals. When the two different chemicals are combined we would notice if it’s acidic or basic. If we had gotten a clear reaction than we would add one drop of acid-base indicator. And if we have gotten a green that would indicate that it’s neutral. The purpose of the lab was to see the outcomes of two different types of chemicals mixed

There’s a difference between a chemical and physical prop-erties/changes. Physical properties are an aspect of matter that can be observed or measured without changing it. The Examples for Physical properties would include: color, smell, freezing point, boiling point, melting point, etc. While Chemical properies may only be observed by changing the chemical identity of a substance. An example for Chemical properties would be rusting iron. Physical change rearranges molecules but doesn't affect their

Shelby Brown 8/28/10 Physical and chemical changes lab essay Changes in matter occur every day. There are two types of ways matter can be altered; physically and chemically. Physical changes do not change the composition of the matter while chemical changes occur when one or more substances turn into a completely new substance. Physical changes can be seen through an altering of the substances physical property. A substances physical property is observed and measured without changing

During the preparation of the, “Turning Pennies Green”, lab, students were asked to perform an experiment at home. The lab demonstrates what the effects of chemical and physical changes are. Students were asked go home, put two pennies in separate bowls, and label one bowl cup A, water and cup B, vinegar. Then, they were asked to place paper towels in the bowl. For cup A, water was to be poured in, but just enough to wet the paper towel inside, so the penny was not submerged. The same was asked

physical change is a change affecting the form of a chemical substance but not its chemical composition. Physical changes can be used to separate mixtures into their component compounds. An example of a physical change is a popsicle freezing in the freezer. A chemical change is any change that results in a new formation of chemical substances. An example of a chemical change is when rust forms on nail. The signs to look for to see if there is a chemical change are color change, odor change, production

Observations of Chemical Changes 9/10/12 Experiment: To examine the reactions of some common chemicals contained in Consumer products and observe the macroscopic changes these chemicals undergo. Examining reactions of common chemicals contained in consumer products. In this lab, it will show the macroscopic changed the chemicals undergo. Objective: To observe some properties of chemical reactions and to associate chemical properties with household products. Chemicals used in this lab