Table 18.2 (continued) 18.20 Solutions Tested pH [H(M) [C,H,O, (M) Percent Dissociation | 0.10 M HCH 0, 2.14 0.010 M HCH 0, 13.09 0.0010 M HC,H,O 284 Question Write the net ionic equation describing the dissociation of acetic acid in aqueous solution. Question Calculate (H) and C.H.O.- for each concentration above, showing a sample cal- culation here Question Write the equilibrium constant expression for acetic acid, and calculate a Kvalue and an apparent percent dissociation for each concentration, showing sample calculations here. Question What is the effect of dilution on the percent dissociation? Why should this behavior be expected Instructor’s Initials: Tonic Equilibria, pH, Indicators, and Buffers 57