Two 15.0 mL samples, one 0.200 MKOH and the other 0.200 M CH3NH2, were titrated with...
Two 15.0 mL samples, one 0.200 MKOH and the other 0.200 M CH3NH2, were titrated with 0.100 MHI. Answer each of the following questions regarding these two titrations.
Predict whether the pH at the equivalence point for each titration will be acidic, basic, or neutral. answer choices directly below
| basic for KOH and neutral for CH3NH2 |
| neutral for KOH and basic for CH3NH2 |
| neutral for KOH and acidic for CH3NH2 |
| acidic for KOH and neutral for CH3NH2 |
| neutral for both |
3. Predict which titration curve will have the lowest initial pH.
| The initial pH will be lower for KOH. |
|
The initial pH will be lower for CH3NH2. |
Homework Answers
Q1. pH at the equivalence point will be : neutral for KOH and acidic for CH3NH2
Q2. The initial pH will be lower for CH3NH2
Explanation
Q1. KOH is a very strong base and HI is a very strong acid. When these solution are mixed in equal quantities, the resulting salt is neutral and the resulting solution is also neutral (pH = 7.00)
CH3NH2 is a weak base and HI is a very strong acid. When these solution are mixed in equal quantities, the resulting salt is acidic in nature and the equilibrium solution is acidic.
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