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Chapter 10 Chemical Reactions

1 Smith, Clark (CC-BY-SA ) GCC CHM 130 Chapter 10: Chemical Reactions Chapter 10 Chemical Reactions Law of Conservation of Matter The Law of Conservation of Matter tells us that matter (or mass) cannot be created nor destroyed. This is very important in Chemical Reactions because it means that the mass of the reactants must equal the mass of the products. Or in other words, the number of reactant atoms must equal the number of products atoms. Because of this law Chemical Reactions must be balanced. What is a Chemical reaction? It is when we us formulas and symbols to describe a Chemical reaction, or reactants becoming products: A + B C + D reactants products what we start with new substance(s) formed Symbols: You must know which elements are solid, liquid, and gas!

In this class we will provide the products for combination and decomposition reactions with either words or the formulas. However YOU must write the product formulas for combustion, acid base, single and double replacement reactions yourself! That is what makes this chapter so hard and probably this is the hardest chapter of the course.

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