CHEM B1110 Lecture Notes - Lecture 10: Chemical Reaction, Covalent Bond
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Dilutio(cid:374) (cid:271)e(cid:272)ause so(cid:373)eti(cid:373)es (cid:455)ou (cid:449)a(cid:374)t to take a (cid:272)o(cid:374)(cid:272)e(cid:374)t(cid:396)ated solutio(cid:374) a(cid:374)d (cid:373)ake a (cid:373)o(cid:396)e dilute solutio(cid:374) out of it. When this happens the moles of solute remain constant throughout the process. Chemical reaction- a rearrangement of atoms that results in the formation of one or more new compounds. Two types of numbers in chemical reactions and they mean different things: numbers in front of the chemical formulas (stoichiometric coefficients, numbers is the formulas (appear as subscripts) Stoichiometric coefficients give the ratio that the reactants and products exist. The subscripts give the ratios of the atoms in the molecule. 2 molecules of h2 + 1 molecule of o2 yields 2 molecules of h2o. 2 moles of h= + 1 mole of o2 yields 2 moles of h2o. Che(cid:373)i(cid:272)al e(cid:395)uatio(cid:374)s ha(cid:448)e to (cid:271)e (cid:271)ala(cid:374)(cid:272)ed fo(cid:396) e(cid:454)a(cid:373)ple . Is an incomplete equation because it is not balanced.