1) A certain weak acid, HA, has a Ka value of4.6×10−7.
Part A
Calculate the percent ionization of HA in a 0.10 Msolution.
Express your answer to two significant figures and include theappropriate units.
1.12×10−2 M Ba(OH)2 Express your answer using three significant figures. Enter youranswers numerically separated by a comma. |
Part B
Calculate the percent ionization of HA in a 0.010 Msolution.
Express your answer to two significant figures, and include theappropriate units.
2)
A 0.120 M solution of a weak acid (HA) has apHof 3.31.
Calculate the acid ionization constant (Ka)for the acid.
Express your answer using two significant figures.
3)
Ammonia, NH3, is a weak base with a Kb value of1.8×10−5.
Part A
What is the pH of a 8.00×10−2M ammoniasolution?
Express your answer numerically to two decimal places.
Part B
What is the percent ionization of ammonia at thisconcentration?
Express your answer with the appropriate units.
4)
If Kb for NX3 is 8.5×10−6 , what is the thepKa for the following reaction?
HNX3+(aq)+H2O(l)⇌NX3(aq)+H3O+(aq)
