Y Aspirin (acetylsalicylic acid, C9 H8O4) is a weak monoprotic acid. To determine its acid-dissociation constant, a student dissolved 2.00 g of aspirin in 0.600 L of water and measured the pH. What was the Ka value calculated by the student if the pH of the solution was 2.61? Express your answer numerically using two significant figures. View Available Hint(s) VE W ? Ka = Submit Part B A 0.100 mol L solution of ethylamine (CH5NH2) has a pH of 11.87. Calculate the K for ethylamine. Express your answer numerically using two significant figures. View Available Hint(s) 195| Kb = Submit