\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOH}(a q)+\mathrm{H}_{2} \mathrm{O}(I) \rightleftarrows \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COO}^{-}(a q)+\mathrm{H}_{3} \mathrm{O}^{+}(a q) . Propanoic acid, CH;CH,COOH, is a carboxylic acid that reacts with water according to theequation above. At 25°C

the pH of a 50.0 mL sample of 0.20 M CH;CH;COOH is 2.79. A.) Identify a Brønsted-Lowry conjugate acid-base pair in the reaction. Clearly label which is the acid and which is the base.