Homework SourseA 1000 mL sample of 010 M NH3 is titrated with 010 M HNO3 De
A 100.0 mL sample of 0.10 M NH3 is titrated with 0.10 M HNO3. Determine the pH of the solution before the addition of any HNO3. The Kb of NH3 is 1.8 × 10-5
a.1.00
7.0
13.00
9.0
| a.1.00 | ||
| b. | 7.0 | |
| c | 13.00 | |
| d | 9.0 |
Solution
pH = 7 - 1/2[Pkb + logC]
[salt] = 100*0.1/200 = 0.05
= 7 - 1/2[4.745 -1.3]
= 7 - 1/2[3.445]
= 7 - 1.72
= 5.28
