8 Chemical Reactions

A chemical reaction is a process that involves change of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction. The key concepts of a chemical reaction are:

One type of chemical reaction, called combustion, involves the burning of various compounds and elements. Some substances are more

3. Summarize the four major types of biochemical reactions studied in this lesson. For each type give its name, a word summary of what happens during the reaction, and an example of where the reaction might be biologically important. (12 marks)

From the experiments, the following have been found to signify a chemical reaction, color change, odor change, energy change, formation of a gas, and formation of a solid. In Experiment 3, observations noted a color change to bright yellow. Chemical reactions result in the formation of new substances with new properties, Experiment 3 had two compounds combined to produce two new compounds. Experiment 4 also had a color change, after the copper was held in the flame it turned a silvery blue. A solid compound formed after the combination of oxygen and copper, proving it to be a chemical reaction.

Objectives: Students will be introduced to chemical reactions, reactants, and products and will build upon their knowledge of chemical versus physical changes.

The reactant represents the substances that you start with the beginning of the experiment. The product is the substance that is made out of the reactants. There are three different ways you can write a chemical equation. They are word, molecular, and symbol

There's a variety of different types of chemical reactions, but the ones I'm going to name down low are the main points of chemical reactions. The names of the different types of reactions is Decomposition, Combustion, Acid/base,Synthesis,Single-Replacement, Double- Replacement and Precipitation. Decomposition is one of the eight chemical reactions. Decomposition is when you get something complex and break it down into smaller molecules. Decomposition is the opposite of synthesis reaction.

The diverse types of chemical reactions include Combination Reaction, Decomposition Reaction, Displacement Reaction and Oxidation Reaction.

Neutralization reactions involve the reaction of a base and an acid to produce a salt and water.

A chemical reaction is when substances (reactants) change into other substances (products). The five general types of chemical reactions are synthesis (also known as direct combination), decomposition, single replacement (also known as single displacement), double replacement (also known as double displacement), and combustion. In this lab, the five general types of chemical reactions were conducted and observations were taken before, during, and after the reaction. Then the reactants and observations were used to determine the products to form a balanced chemical equation. The purpose of this lab was to learn and answer the question: How can observations be used to determine the identity of substances produced in a chemical reaction?

A chemical reaction is a process in which elements or compounds react with one another to create new or different substances. There are two parts to a reaction. Those two parts are the products and the reactants. The reactants are the chemicals or chemical compounds that are going through the reaction itself. The products are chemical elements or chemical compounds that are produced as a result of the reactant or reactants reacting. There are four key indications that there’s a chemical reaction is taking place. Those four signs include a change in color and/or odor, formation of a precipitate or a gas, the release or absorption of energy (light, heat, electricity), and if the reaction is irreversible. Along with this information, there are ways to predict the products of a reaction.

Chemical reactions make new things by rearranging other things. In a chemical reaction, the main change that occurs relates to the way atoms are bonded to each other, in order to change those connections, bonds must be broken and new bonds be formed.

There are now many classification systems to classify the different types of reactions. These include decomposition, polymerization, chain reactions, substitute reactions, elimination reactions, addition reactions, ionic reactions, and oxidation-reduction reactions.

A chemical reaction is when two or more (different) substances, react with each other to form new chemical substances(product). In a chemical reaction, the molecular structure is rearranged.When the molecular structure is rearranged it can increased or decreased. The signs of a chemical reaction include a colour change, temperature change, formation into a gas and odour change. The rate of reaction can be increased by increasing the temperature, concentration and the expansion of the surface area which is explained by collision theory collision theory. Collision theory is when the kinetic energy increases the chance that the atoms and molecules collide. Kinetic energy is an energy which a body possesses by virtue of being in motion. By increasing the temperature the particles start to move around quicker because they have more energy. This means that it is more likely to collide with the other substance making it easier than to collide with each other, making the reaction rate higher. Changing the concentration of the solution the particles become more crowded, therefore there is a greater chance of the particles colliding, increasing the rate of the reaction. Lastly, by expanding the surface area the particles are more exposed to the reactant, there's will be more constant so the rate of reaction increases.

Nuclear chemistry is the study of the reactions and functions of the chemistry uses of the nucleus. The nucleus contains two types of components called the nucleons, which consist of the proton and neutron. The mass number of an atom is defined by the sum of the protons and neutrons; the atomic number of an atom is defined by the number of protons only. Atoms which have different mass numbers but have the same atomic number are referred as isotopes, for example carbon 12, 13, and 14.Nucleus with special numbers of the neutron and protons are referred as nuclides. Radio nuclides are usually unstable and it continuously emits particles as well as emits the electromagnetic radiation. Emission is the process of the unstable nucleus to undergo and become stable, this way it reduces the cost of the energy. For example the Uranium-238,which decays into an alpha particle (Helium nucleus) and a nucleon (Thorium-234). When the Uranium-238 decays it decomposed at the same time, this process can be also called as alpha-decayed. The equation for that is:238U92 -> 234Th90 + 4He2 + Gamma rays.