Chapter 7 summary 6e (1).pdf - Chapter 7 Chemical Reactions and Quantities Summary 7.1 Equations for Chemical Reactions A chemical reaction also known

Chapter 7 summary 6e (1).pdf - Chapter 7 Chemical Reactions...

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1 Chapter 7 Chemical Reactions and Quantities Summary 7.1 Equations for Chemical Reactions A chemical reaction , also known as a chemical change , is the process when new substances are produced. A chemical reaction occurs when the atoms of the initial substances (reactants) regroup to form new substances (products). Burning wood is an example of a chemical change because this process will utilize oxygen and release carbon dioxide and water. Wood is eventually turning into ashes, smoke and water. But grinding almonds into almond flour would be a physical change. Chemical compositions remain the same; only shapes change. Evidence of chemical reactions can be change in color , formation of gas (fizzing or bubbles), or formation of solid (precipitation). The formulas of the reactants are written on the left side of the arrow and the formulas of the products on the right side, reactants à products . In chemical reactions atoms are neither created nor destroyed, therefore equations must be balanced. Coefficients are used in front of one or more formulas to balance out equations, so that for
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