7: Chemical Reactions
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- 7.1: The Chemical Equations
- In a chemical change, new substances are formed. In order for this to occur, the chemical bonds of the substances break, and the atoms that compose them separate and rearrange themselves into new substances with new chemical bonds. When this process occurs, we call it a chemical reaction. A chemical reaction is the process in which one or more substances are changed into one or more new substances.
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- 7.2: Balancing Chemical Equations
- Even though chemical compounds are broken up and new compounds are formed during a chemical reaction, atoms in the reactants do not disappear, nor do new atoms appear to form the products. In chemical reactions, atoms are never created or destroyed. The same atoms that were present in the reactants are present in the products—they are merely reorganized into different arrangements.
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- 7.3: Acid Base Reaction
- An acid-base reaction is one in which a hydrogen ion is transferred from one chemical species to another. Such reactions are of central importance to numerous natural and technological processes, ranging from the chemical transformations that take place within cells and the lakes and oceans, to the industrial-scale production of fertilizers, pharmaceuticals, and other substances essential to society.
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- 7.6: Content in Context
- In this unit, we'll explore how air pollutants interact with other chemicals in the atmosphere to form new pollutants. Now that you're familiar with chemical reactions, we'll apply that knowledge to understand processes like how nitrogen oxides react with volatile organic compounds...
Thumbnail: This image shows five main types of chemical reactions. (CC BY-SA 4.0; Dharmeshkumar Shah via Wikimedia )