Titration Experiment 1: Acid-Base Titration: Unknown HCl Write chemical equation + H2C NaCHcay"+ Noclag) HClcog> Nacog tOH cop) + H Ceg) + Cl →Na ta) + Clan+ Write NIE Enter the data into the table and choose three titrations to find the molarity of the unknown He Unknown # HCI Titration 1 Titration 2 Titration 3 Titration 4 Titration 5

D How is the pka determined in a titration for the removal of a proton in an acid? It is the pH at the equivalence point It is the initial pH of the acid solution It is the pH halfway between equivalence points O The pKa cannot be determined in a titration Question 4 The volume of sodium hydroxide required to reach the equivalence point is 35.69 mL for a monoprotic acid. What is the volume at which the pKa is determined? Report your answer to one decimal place. Question 5 The final equivalence point in the cola titration cannot be determined because the sodium hydroxide pH is too low. True False

Questions 15-20 refer to the same weak base/strong acid (WB/SA) titration. The K of pyridine is 1.7 x 10-⁹. A 40.00 mL solution of 0.700 M pyridine (C5H5N) is being titrated with 1.05 M hydrochloric acid (HCI). What is the solution pH at the equivalence point? (Two decimal places) Type your answer...

1.00 x 10-² A student was titrating a solution of HC4H7O₂ with a Sr(OH)2 solution. Determine the pH at a particular point in the titration. Do this by constructing a BCA table and determining the pH. Complete Parts 1-2 before submitting your answer. Before (mol) Change (mol) After (mol) NEXT > 40.0 mL of a 0.200 M HC4H7O2 solution was titrated with 100 mL of 0.100 M Sr(OH)2 (a strong base). Fill in the ICE table with the appropriate value for each involved species to determine the moles of reactant and product after the reaction of the acid and base. You can ignore the amount of water in the reaction. 0 -1.00 x 10-² 1 HC4H-O₂(aq) + 0.100 1.20 x 10-² 0.200 OH-(aq) -1.20 x 10-² 2.00 x 10-³ 2 2.00 x 10-² H₂O(l) + -2.00 × 10-³ -2.00 x 10-² C4H7O₂ (aq) 8.00 x 10-³ RESET -8.00 x 10-³