Which of the following solutions is a good buffer system? Question 2 options: A solution that is 0.10 M HC2H3O2 and 0.10 M LiC2H3O2 A solution that is 0.10 M HF and 0.10 M NaC2H3O2 A solution that is 0.10 M HCl and 0.10 M NH4+ A solution that is 0.10 M NaOH and 0.10 M KOH None of the above are buffer systems.

Which of the following is not a characteristic of a hydrogen bond? 1. it is responsible for the unusual physical properties of water. 2. it is weaker than a covalent bond. 3. it is stronger than other dipole-dipole interactions. 4. it can occur when hydrogen is covalently bound to very electronegative elements liks f, cl, br and i.