Transcription of Chapter 10 Chemical Reactions
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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!!! (s) = solid (g) = gas (l) = liquid NR = no reaction = heat (aq) = aqueous solution (ions or compounds dissolved in water) Example: H2SO4 (aq) + 2 NaHCO3 (s) Na2SO4 (aq) + 2 H2O (l) + 2 CO2 (g) Diatomic Molecules: You should know the seven elements that exist as diatomic molecules: H2(g) N2 (g) F2(g) O2(g) I2(s) Cl2(g) Br2(l) Have no f
Given a chemical equation with any hydrocarbon and oxygen gas as reactants, predict the products for the reaction ( H 2 O (g) + CO 2 (g) ) Balance combustion reactions (Tip: balance oxygen last) 10.7 Acid Base Neutralization Reactions HX + MOH → H 2 O(l) + MX Water is formed in some acid base reactions.
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