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    Chemical Changes

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    When matter goes through a physical change its appearance changes not its molecules. Stepping on an aluminum can and crushing it is a physical change, its shape changes but the energy inside the can did not change meaning it couldn’t be a chemical change. Chemical changes happen on a very small scale and can happen over a period of time. Chemical changes are a change that forms a new chemical substance. A chemical changes is the breaking or joining of bonds and atoms. Iron rusting, gasoline

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    Investigationg of Chemical and Physical Changes Why I am conducting this experiment? In order to learn how to recognize chemical and physical changes, I have to carry out this experiment to see different chemical and physical changes of different substance. How can we recognize physical changes and chemical changes? ----------------------------------------------------------- A chemical change involves a creation of a new substance, but a physical change doesn’t involve any creation

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    Temperature's Effect on the Rate of a Chemical Change Introduction This investigation is about how temperature can affect the rate of chemical change of calcium carbonate in the form of solid marble chips reacting with dilute hydrochloric acid. During the investigation I will try to find out how by changing the temperature of the solvent this will affect the rate of chemical change of calcium carbonate and hydrochloric acid. For every experiment I do, I will measure the amount of carbon

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    INTRODUCTION: Chemical Change

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    Chemical changes are when substances combine to form a new substance which is called synthesis and are usually irreversible. A chemical reaction causes atoms in the substances to rearrange and change their properties or composition therefore resulting in at least one new substance. Chemical reactions can also cause the decomposition of a substance resulting in two or more different substances. There are many manmade and natural chemical changes that happen everyday. Two main natural chemical changes

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    Chemical Changes Lab

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    1. For the chemistry and chemical changes unit I placed standards 2.1.2, 4.1.1, 4.1.2, and 6.1.7. I found standard 2.1.2 in the fourth to sixth grade lab Mixtures and Solutions. In 1| Mixtures my lab group and I mixed three different solids (gravel, powder, and salt) with 50 mL of liquid water in three different cups. We examined and discussed the color, texture, particle shape, and particle size of the solids and then made observations when the water was added and discussed the properties of the

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    Detecting Signs of Chemical Change Abstract: The objective of this experiment will be to combine various substances, liquids and metals, and to observe their behavior when they are combined. The types of reactions observed shall determine the nature of these reactions: physical or chemical. Introduction: An elements¡¦ reaction to certain substances may be predicted by its placement on the Periodic Table of Elements. Across a period, an element on the left will react with more vigor

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    and chemical changes. The physical properties of a substance can be observed and measured without changing the composition of the substance. It can be used to identify and describe substances.  Physical properties of matter include odor, color, density, solubility, boiling point and melting point, and its physical state at room temperature. A colorless, odorless liquid that freezes at 0°C and boils at 100°C is probably water, for example. Every substance also has chemical properties. Chemical properties

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    … A chemical changes lead to the formation of substances that help grow our food , make our lives more productive , a chemical change or chemical reaction is a process in which one or more pure substances are converted into one or more different pure substances , The Chemical changes take place as one substance is converted into another , it Can the conditions be altered to speed the changes up, slow them down, or perhaps reverse them , Once chemists understand the nature of one chemical change

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    Investigation to find out if changes in concentration of acid affect the rate of a chemical reaction PLANNING – Title – Investigation to find out if changes in concentration of acid affect the rate of a chemical reaction. Introduction – The rate of reaction can be defined as the speed at which a reaction takes place. The rate of reaction tells us how quickly a chemical reaction has happened. There are many things that can affect the rate of reaction, (some of these are shown in figure 1 below

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    Chemical Warfare Changes

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    "The military use of chemicals, bacteria, viruses, toxins, or poisons to injure or kill soldiers or civilians is called chemical and biological warfare. The means by which the harmful substances are delivered to the enemy are called chemical and biological weapons. Formerly, the use of smoke, flares, flamethrowers, napalm, and the like was considered to be chemical warfare, but now the term is generally limited to the use of toxic agents on the battlefield." ("Chemical weapon." Britannica School

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