Reverse Outlinino Warlek Name (Please Print Clearly Principles of Chemistry II C

Question

Reverse Outlinino Warlek Name (Please Print Clearly Principles of Chemistry II CHEM1212 Exam #3 (Extra Credit Problems) Due on Thursday March 15 (Beginning of Class time) Have this question sheet attached (stapled) to your solved problems 1. Justify which of the following produces the lowest value of pH? A) aniline (pK-9.37)B) pyridine (pKb 8.75) C) nicotine (pKb 5.98) D) ammonia (pk 4.74) E) methylamine (pKb-3.44) 2. Justify which of the following will have a conjugate acid with the lowest value of pH? A) aniline (pKb-9.37) B) pyridine (pKb 8.75) C) nicotine (pKb-5.98) D) ammonia (pKs-4.74) E) methylamine (pKb 3.44) 3. What is the pH of 0.25 M HC HO2 (K-9.0 x 10) Justify any assumptions 4. What is the pH of 0.25 M CHO (Important: notice the relation of this chemical to the one in the previous question. Justify any assumptions

Explanation / Answer

Lowest the value of PKb more is basic and high value of Pkb less the basic and more acidic hence A>B>C>D>E

2.More acidic less conjugate Base and vice versa..hence A>B>C>D>E

3.

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