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Acids and Bases

Acids and Bases. Definitions. Acid Base Conjugate Acid or Base Neutralization Reaction Normality. Titrations. What’s important The exact concentration of known solution The exact volume of unknown solution The exact endpoint. Titration Calculations.

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Acids and Bases

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  1. Acids and Bases

  2. Definitions • Acid • Base • Conjugate Acid or Base • Neutralization Reaction • Normality

  3. Titrations • What’s important • The exact concentration of known solution • The exact volume of unknown solution • The exact endpoint

  4. Titration Calculations • Calculate how many moles of titrant (known solution) added. 2. Check ratio of molestitrant : moles OH- 3. Determine moles of unknown 4. Calculate Normality of unknown 5. Determine Molarity of unknown

  5. Titration Calculations 0117 .468. .234 .330 Example: 15.60 ml of a 0.750M sodium hydroxide solution are required to bring 25.00 ml of a diprotic acid solution to its endpoint. 1) Determine Molarity of acid solution 2) Determine the pH of the solution

  6. Titration Practical Quiz Take appropriate minibeaker Note: pH will be between 1-3 Solution you will need: 0.05M NaOH Think about how to mix this accurately What you are allowed: notes/procedure/data from yesterday that’s all !! Turn In Description/data/calculations/comparison

  7. Acids and Bases the next step • Terms to define and relate to a weekend without formal chemistry lessons; • Chemical Equilibrium • Dynamic Equilibrium • Law of Mass Action • Le Chantlier’s Principle • Temperature, pressure, concentration • Dissociation constant • Equilibrium constant • Strong Acid/base • Weak Acid/base • Ka, Kb

  8. Weekend assignment • Identify a dynamic equilibrium system influencing your existence. • Identify three variables (conditions) that move or change the equilibrium you’ve identified. • Be prepared to explain this to the class Monday.

  9. Assignment for Tuesday • Read sections 17.1-17.3 from your text on reaction rates and chemical equilibriums (equilibria) • Research (Web) what happened in West, TX last Tuesday. Write a half page paper describing how conditions present at the fertilizer plant, or introduced to the fertilizer plant changed any reaction rates or equilibria during the evening hours there. Your grade (15 pts) will depend on your specificity and depth of information.

  10. Factors that affect reaction rate

  11. Factors that affect equilibrium

  12. Calculations involving equilibria • Section 17.6 • Equilibrium Expression: • Practice: • Read Section 17.617.7 • Questions: P 570, q 18,20,22,23,24,25

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