This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: R-NH3+ ﬂ‡ R-NH2 + H+ (a) In what pH range can glycine be used as an effective buffer due to its amino group? (b) In a 0.1 M solution of glycine at pH 9.0, what fraction of glycine has its amino group in the -NH3+ form? (c) How much 5 M KOH must be added to 1.0 L of 0.1 M glycine at pH 9.0 to bring its pH to exactly 10.0? (d) When 99% of the glycine is in its -NH3+ form, what is the numerical relation between the pH of the solution and the pKa of the amino group? Q5. A compound has a pKa of 7.4. To 100 mL of a 1.0 M solution of this compound at pH 8.0 is added 30 mL of a 1.0 M solution of hydrochloric acid. The resulting solution is at what pH? (A) 7.58 (B) 7.40 (C) 7.22 (D) 6.8 (E) 6.53 Q7. When compared to Watson-Crick hydrogen bonding, the shapes of correctly paired nucleotide bases are as important, if not more, in determining the fidelity of DNA replication. Explain why this is so....
View Full Document
This note was uploaded on 04/12/2008 for the course MCB 100 taught by Professor Berger during the Fall '04 term at University of California, Berkeley.
- Fall '04