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CH 16_student_6_per_page_sp07

Hpo42 and oh as the acids 0 0 0 4 hpo42 and h2o as a

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Unformatted text preview: acids 0% 0% 0% 4. HPO42- and H2O as a conjugate pair 0% Slide 11 of 48 CHM 25 SP07 Slide 12 of 48 CHM 25 SP07 CHM 25 SP07 2 The Self-Ionization of Water and the pH Scale Ion Product of Water base acid conjugate conjugate base acid H2O + H2O H3O+ + OH- Kc= [H3O+][OH-] [H2O][H2O] KW= Kc[H2O][H2O] = [H3O+][OH-] = 1.0×10-14 Slide 13 of 48 CHM 25 SP07 Slide 14 of 48 CHM 25 SP07 pH and pOH ♦ The potential of the hydrogen ion was defined in 1909 as the negative of the logarithm of [H+]. pH = -log[H3O+] pOH = -log[OH-] pH and pOH Scales KW = [H3O+][OH-]= 1.0×10-14 -logKW = -log[H3O+]-log[OH-]= -log(1.0×10-14) pKW = pH + pOH= -(-14) pKW = pH + pOH = 14 Slide 15 of 48 CHM 25 SP07 Slide 16 of 48 CHM 25 SP07 You add 0.0010 mol of NaOH to 1.0 L of NaOH to pure water. Calcu...
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