Chapter 19 SI Sunday Tuesday Wednesday 7:30-8:30 Morton 219 1. a. Calculate the PH of buffer solution consisting of 0.60 M HF and 0.60M F-; b. what’s the PH after adding 0.020mol of solid NaOH to 1.0L of the buffer in part a (HF of Ka= 6.8x10^-4) c. what’s the PH after adding 0.020mol of solid HCl to 1.0L of the buffer in part a (HF of Ka= 6.8x10^-4) 2. preparing a buffer solution to prepare a buffer of PH 10.00, how many grams of Na2CO3 must added to 1.5L of 0.20M NaHCO3 to make the buffer? Ka of HCO3- is 4.7x10^-11. 3. titrates 20.00ml of 0.200M HBrO (Ka=2.3x10^-9) with 0.100M NaOH, what’s the PH? a. before base added? b. when [HBrO]=[BrO-] c. at the equivalence point? d. when the amount (mol) of OH- added is twice the amount of HBrO present initially? 4. write the ion product expressions a. MgCO3 b. Fe(OH)3 c. Ca3(PO4)2