Chem 178 SIThursday, October 25, 2007Acid/Base Titrations1. Suppose we titrate 20.0 mL of 0.10 M HCHO2 (Ka = 1.8 x 10-4) with 0.100 M NaOH. Calculate the pH…a. Before any based is added.b. When half the acid has been neutralized.c. After a total of 15.0 mL of base has been added.d. At the equivalence point.2. In the titration of 20.0 mL of 0.15 M NH3 with 0.10 M HCl, what is the pH at 10.0, 20.0, 30.0 mL? (Kb = 1.5 x 10-5).Chem 178 SIThursday, October 25, 20073. What is the concentration of each ion in a saturated solution of AgI? (Ksp = 8.3 x 10-17).4. What is the concentration of each ion in a saturated solution of Al(OH)3? (Ksp = 1.9 x 10-33).5. Will a precipitate of CaSO4 form in a solution if the Ca2+ concentration is 0.0025 M and the SO42- concentration is 0.030 M? (Ksp = 2.4 x 10-5)6. Will a precipitate form in a solution containing 3.4 x 10-4M CrO42- and 4.8 x 10-5 M Ag+? (Ksp = 1.2 x
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