Arrange these elements in order of increasing first ionization energy: Si, F, In, N.
Chapter 15 - Applications of Aqueous Equilibria Acid-Base Equilibria 15.1 Solutions of Acids or Bases Containing a Common Ion A. Common Ion 1. Ion provided in solution by an-aqueous acid (or base) as well as a salt a. HF(aq) and NaF (F in common) HF(aq) ¸ H (aq) + F (aq) Excess F added by NaF Equilibrium shifts away from added component. Fewer H ions present. pH is higher than expected. b. NH O4 and NH Cl (4H 4+in common) + - NH 3aq) + H O(2) ¸ NH 4aq) + OH (aq) Equilibrium shifts to the left. pH of -he solution decreases due to a decrease in OH concentration B. Equilibrium Calculations 1. Consider initial concentration of ion from salt when calculating values for H + - and OH 15.2 Buffered Solutions A. Buffered Solution 1. A solution that resists a change in pH when either hydroxide ions or protons are added. 2. Buffered solutions contain either: a. A weak acid and its salt b. A weak base and its salt B. Calculations Involving Buffered Solutions Containing Weak Acids 1. "Buffered solutions are simply solutions of weak acids or bases containing a common ion. The pH calc