4.4 Boric acid, \( \mathrm{B}(\mathrm{OH})_{3} \), a weak acid is used as a mild antiseptic. It ionizes in water as follows: \[ \mathrm{B}(\mathrm{OH})_{3}(\mathrm{aq})+2 \mathrm{H}_{2} \mathrm{O}(\mathrm{l}) \rightleftharpoons \mathrm{B}(\mathrm{OH})_{4}^{-}(\mathrm{aq})+\mathrm{H}_{3} \mathrm{O}^{+}(\mathrm{aq}) \] 4.4.1 Calculate the hydronium ion concentration of a 0.015 M aqueous solution of boric acid, given that the equilibrium constant for this reaction is \( 5.9 \times 10^{-10} \).

\[ \mathrm{Fe}_{2} \mathrm{O}_{3}(\mathrm{~s})+2 \mathrm{Al}(\mathrm{s}) \rightleftharpoons \mathrm{Al}_{2} \mathrm{O}_{3}(\mathrm{~s})+2 \mathrm{Fe}(\mathrm{s}) \] View Available Hint(s) The equilibrium will shift toward the reactants. The equilibrium will shift toward the products. The reaction will not shift toward either the products or reactants. The reaction will shift toward both the reactants and products.

Based on your worksheet results, please match the following: The electron group geometry of NH 3 is The electron group geometry of BF 3 is [Choose ] The electron group geometry of \( \mathrm{PF5} \) is [Choose ] [Choose ] electron group geometry of SF4 is geometry of PF 3 is [Choose ]

Based on your worksheet results, please match the following: The electron group geometry of CCl 4 is The electron group geometry of CHCl 3 is [Choose ] [Choose ] The electron group geometry of \( \mathrm{SO}_{3} \) is [Choose ] [Choose ] electron group geometry of H 2 O is [Choose ]

Which of the following represent a buffer system? Check all that apply. \( \square \mathrm{NaOH} \) and NaCl \( \square \mathrm{H}_{2} \mathrm{CO}_{3} \) and \( \mathrm{NaHCO}_{3} \) HF and KF KCl and NaCl

Please select polar molecule(s) from the following. \( \square \mathrm{CCl} 4 \) \( \square \mathrm{CHCl} 3 \) \( \square \mathrm{CO} 3 \) CO 2