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