moles - Moles Chemical Equations Chapter 5 1 Chemical...

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1 Moles: Chemical Equations Chapter 5 1. Chemical Equations - Reactants Products use subscripts to denote phase: H 2 O (g) H 2 O (l) H 2 O (s) NaCl (aq) g = gas l = liquid s = solid aq = aqueous (dissolved in water) Atoms are conserved- atoms are not created or destroyed only rearranged. 1bicyle frame + 2 wheels bicycle (wheels 2 frame) need to balance the reaction with numbers in front add 2 Ag + (aq) + Cl - (aq) AgCl (s) 2 Mg (s) + O 2(g) 2 MgO (s) need to balance Mg 1 Mg 1 O 2 O 1 need 2 O Never touch subscripts, only whole numbers in front
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2 Ex. 2 BaO 2(s) 2 BaO (s) + __O 2(g) Ex. 2 KClO 3(s) 2 KCl (s) + 3 O 2(g) Ex. 2 AgNO 3(aq) + BaCl 2(aq) Ba(NO 3 ) 2(aq) + 2 AgCl (s) treat NO 3 as one big unit Ex. C 4 H 8(g) + 6O 2(g) 4CO 2(g) + 4H 2 O (g) 2. Types of Reactions a. Combustion Rxns- Organic molecule C x H y O z reacts with O 2 to form CO 2 and H 2 O. C 6 H 12 O 6(s) + 6O 2(g) 6CO 2(g) + 6H 2 O (g) + energy (glucose) Formation of oxides. C + O 2 CO 2 2Mg + O 2 2MgO
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3 b. Oxidation – Reduction, LEO the lion goes GER 1. X + 2e’ X 2- reduction gain of e’
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moles - Moles Chemical Equations Chapter 5 1 Chemical...

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