Week 4 notes CHEM
Week 4 notes CHEM CHEM-10055-003-201580
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This 4 page Class Notes was uploaded by Hanna Notetaker on Friday September 25, 2015. The Class Notes belongs to CHEM-10055-003-201580 at Kent State University taught by Bansidhar Datta (P) in Fall 2015. Since its upload, it has received 107 views. For similar materials see MOLECULES OF LIFE in Chemistry at Kent State University.
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Date Created: 09/25/15
Chemistry week 4 Acids and Bases Acids Non metals and oxygen form non metal oxides when nonmetal oxides are dissolved in water acidic solution C 9 OzlGl 9 C02 carbon dioxide C02 H20 9 H2C03 carbonic acid 2N25029 2N205 2HN03 nitric Acid 2P203 phosphoric acid H2504 sulfuric acid Halogenic Acids Group 7 Formula H2 X2 2 HX g X group 7 element H2F29 2HF hydrofluoric acid H2C29 2HC hydrochloric acid H2Br29 2HBR hydrobromic acid H229 2H hydroiodic acid Bases Metals and oxygen form metal oxides basic solution created when dissolved in water Group 1 Elements Li029 LiZO s lithium hydroxide Na 02 9 NaZO sodium hydroxide K029 K20 potassium hydroxide Group 2 Mg029 MgO balanced 2Mg029 2MgO o MgOhzo9 MgOHz Ca029 CaO balanced2Ca029 2CaO o CaOhzo9 CaOHz Ba029 BaO balanced ZBa029ZBaO o BaOhzo9 BaOHz Group 3 A 02 9 A203 baanced 4Al 302 9 2A203 Aluminum hydroxide AOH3 Ga 02 9 6303 baanced 4Ga 302 9 2Ga203 Gallium hydroxide GaOH3 Periodicity being able to predict properties of an element by knowing the property of a different element in the same group Acids Acids with protons that dissociate completely in water are strong acids woth a very low pH Acids that dissociate partially in water are weak acids with a high pH Monoprotic acid Hx HCIO4 HN03 Diprotic acid H2504 Triprotic acid H3PO4 All acids have protons Acids dissociate in water to generate hydronium ions H30 Measured by pH pH unit of concentration log of H30 tell how much hydronium is present Bases Bases with CH hydroxide groups dissociate completely in water are strong and have a high pH Bases that dissociate partially in water are wear bases with a low pH Mono basic NaOH KOH Di basic MgOH2 CaOH2 Tri basic AOH3 Bases all have hydroxide ions Bases dissociate in water to generate hydroxide ions OH39 Measured by pOH determines the concentration of OH l39 H20 9 H30 HBr H20 9 H30 Br Lone pairs electron pairs that are not bonded If acids dissociate in water near 100 strong acid Less than 100 weak acid Examples Monobasic strong acid NaOH H20 9 Na aq OH39aq KOH H20 9 K aq OH39 aq Di basic weak acid MgOH2 H209 Mg2 aq ZOH39 aq CaOH2 H20 9 Ca2 aq 2 OH39aq Tri basic weak A0H3 H209 AI3 aq 30H aq ALWAYS pH pOH 14 Ex if a solution has pH 1 the pOH is 13 pH defines acids and bases Solutions acidic pH less than 7 basic pH higher than 7 neutral pH is 7