CH 16_student_6_per_page_sp07

0010 10 x 10 11 m this solution is because h3o slide

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Unformatted text preview: ution is _________ because [H3O+] Slide 19 of 48 If the pH of Coke is 3.12, it is ____________. If Because pH = - log [H3O+] then Because log [H3O+] = - pH Take antilog and get [H3O+] = 10-pH [H3O+] = 10-3.12 = 7.6 x 10-4 M 7.6 CHM 25 SP07 Slide 20 of 48 CHM 25 SP07 < [OH-] Strong Acids and Bases HCl CH3CO2H Weak Acids and Bases Acetic Acid Thymol Blue Indicator pH < 1.2 < pH < 2.8 < pH Lactic Acid Slide 22 of 48 Glycine CHM 25 SP07 Slide 21 of 48 CHM 25 SP07 ! "# $ % & ! "# Consider acetic acid, CH3CO2H (HOAc) Consider HOAc + H2O H3O+ + OAcOAc Acid Conj. base Ka = [H3 O+ ][OAc - ] = 1.8 x 10 -5 [HOAc] (K is designated Ka for ACID) for ACID Because [H3O+] and [OAc-] are SMALL, Ka << 1. Slide 23 of 48 CHM 25 SP07 Weak acid has Ka < 1 Weak Leads to small [H3O+] and a pH of 2 - 7 Leads and Slide 24 of 48 CHM 25 SP07 CHM 25 SP07 4 Weak Acids & Acetic Acid % ! "...
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This note was uploaded on 10/24/2009 for the course CHEM 025 taught by Professor X during the Spring '06 term at Lehigh University .

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