Name: College ID: Thomas Edison State College General Chemistry II with Labs (CHE-122) Section no.: Semester and year: Slope: Inverse Slope: Slope: Inverse Slope: Slope: Inverse Slope: Order of H O : Order of IKI: Rate law constant: *Show Calculations and Include Graphs Overall rate law: Name: College ID: Thomas Edison State College General Chemistry II with Labs (CHE-122) Section no.: Semester and year: Volume of NaOH when solution turns dark pink/orange: Volume of NaOH at the equivalence point (the point on the graph midway between the vertical rise; see Lab 7 [19], Figure 2): pH at the equivalence point (should be approximately 8–9): Volume of NaOH at equivalence point: Volume at half-equivalence point: pH at the half-equivalence point: pH = p at this point (equilibrium constant): p = –log Experimental of acetic acid: Theoretical of acetic acid: Compare your experimental value for the equilibrium constant to the theoretical value. Do you notice any variation? If so, why? Write the dissociation of acetic acid, HC H O . Write the
equilibrium expression for acetic acid. ================== Name: College ID: Thomas Edison State College General Chemistry II with Labs (CHE-122) Section no.: Semester and year: Mass of beaker: Mass of beaker and citric acid: Mass of beaker and citric acid (after cooling): Volume of NaOH: Mass of citric acid: Moles of citric acid: (MW = 192.0 g/mol) Molarity of citric acid: (volume of solution = 100 mL) Trial 1 equivalence point: Trial 2 equivalence point: Molarity (Trial 1): Molarity (Trial 2): Average Molarity: Use Figure 3 in your laboratory manual to determine which combination of acids and bases provide the most distinguishable equivalence point. Which combination is the most difficult to determine an equivalence point? There are many different primary standards that could be used in a standardization titration. What are the criteria of a primary standard? Potassium hydrogen phthalate (KHP; KHC H O ) is a good primary standard. If it took 20.0 mL of NaOH to react with 15.5 mL of 0.600 KHP solution, what is the molarity of the NaOH solution? KHC H O + NaOH ? KNaC H O + H O