Wine is a complex mixture of over 1000 compounds, many at very low concentrations A large number of flavorful components are derivatives of phenol, C 6 H 5 OH, a weak acid If you are an enologist studying wine chemistry, you may wish to know how dilute compounds such as phenol affect the acidity of...

With x HO Eq 3b becomes Find K for phenol in Table 6C1 Evaluate Kw KHA initial Evaluate ...

Wine is a complex mixture of over 1000 compounds, many at very low concentrations. A large number

Question:

Wine is a complex mixture of over 1000 compounds, many at very low concentrations. A large number of flavorful components are derivatives of phenol, C₆H₅OH, a weak acid. If you are an enologist studying wine chemistry, you may wish to know how dilute compounds such as phenol affect the acidity of wine. Use Eq. 3b to estimate the pH of a 1.0 * 10^–4 m aqueous phenol solution.

ANTICIPATE Phenol is a weak acid, so you should expect pH

PLAN Because Eq. 3b is complicated, first find the numerical factor of the third term, K_w + K_a[HA]_initial, and the value of the fourth term, K_aK_w. For simplicity, write x = [H₃O⁺].