Consider an ammonium buffer (NH4+).  Which species would react if an external acid, H3O+ were added? a. NH3 b. NH4+ c. H3O+

What conjugate base could be used to make a methylammonium buffer (CH3NH3+) at pH = 10.50? a. CH3NH2 b. CH4NH3+ c. CH2NH2- d. NH4+

Which of the options below correctly describes what happens when a small amount of strong base is added to a buffer solution consisting of the weak acid HA its conjugate base A-? Oa. The concentration of H* increases and the pOH decreases. Ob. The concentration of H* increases and the pOH remains the same. Oc. The concentration of Ht decreases and the pOH decreases. Od. The concentration of H* remains the same and the pOH remains the same. Oe. The concentration of H* remains the same and the pOH increases.

Which of the following combination would make a good buffer? A. H2C4H4O6 + Na2C4H4O6 B. HCl + NaOH C. HCl + NaCl D. H2C4H4O6 + NaOH E. HNO3 + NaNO3 F. More than one of these

A. What is the Kb when the Ka of a solution is 5.47x10^-4? B. the Ka of an acid is determined to be 0.00589. What is the Pka? C. A solution is made where 0.878 moles HCl is added to water that has a total volume of 1855mL. what is the PH of the solution?

Which of the following statements are TRUE of buffer solutions? 1. A buffer solution can be made by mixing equal concentrations of acetic acid and sodium acetate. 2. A buffer solution can be made by mixing equal concentrations of hydrochloric acid and sodium chloride. 3. A buffer solution resists changes in pH when small quantities of acid or base are added. O 1 and 2 only O 2 and 3 only O 1 and 3 only All of 1, 2, and 3 O None of these responses åpply.