(Solved): Using activity coefficients, calculate the pH of a solution containing a 4.00:1.00 mole ratio of ...

Using activity coefficients, calculate the pH of a solution containing a 4.00:1.00 mole ratio of H?C¯:HC² ? (H?C = citric acid). The ionic strength is 0.010 M. The pKa values for citric acid are 3.13, 4.76, and 6.40. pH = What will be the pH if the ionic strength is raised to 0.10 M and the mole ratio H?C¯:HC²¯ is kept constant? pH = for Aqueous Solutions at 25°C Ion Activity Coefficients H+ Charge= +/-1 (C6H5)2CHCO2, (C3H7)4N+ (O2N)3C6H?O,(C3H7)NH*,CH3O6H4CO2- Lit,C6H5CO?, HOC6H4CO2-, ClC6H4CO2-, C6H5CH?CO2, CH2=CHCH?CO2-(CH3)2CHCH?CO2-, (CH3CH?)4N+, (C3H7)2NH2+ Cl?CHCO?, C13CCO2, (CH3CH?)3NH*, (C3H7)NH3+ Na+, CdCI+, ClO?, 103, HCO3, H?PO4, HSO3, H?AsO4", Co(NH3)4(NO2)2+, CH3CO?, CICH?CO?™, (CH3)4N+, (CH3CH?)2NH?, H?NCH?CO? +H3NCH?CO?H,(CH3)3NH+, CH3CH?NH3+ OH, F, SCN, OCN, HS, CIO3, CIO4, BrO3, IO4", MnO4, HCO?, H?citrate, CH3NH3*, (CH3)2NH?+ K+, Cl, Br, I, CN, NO?, NO3 Rb+, Cst, NH4+, TI+, Ag+ Ion size (a ,pm) 900 800 700 600 500 450 400 350 300 250 0.001 0.005 0.967 0.933 0.966 0.931 0.965 0.930 0.965 0.929 0.964 0.928 0.964 0.928 0.964 0.927 0.964 0.926 0.964 0.925 0.964 0.924 Ionic Strength(?‚M) 0.01 Activity coefficient (y) 0.914 0.912 0.909 0.907 0.904 0.902 0.901 0.900 0.899 0.898 0.05 0.1 0.86 0.83 0.85 0.82 0.845 0.81 0.835 0.80 0.83 0.79 0.82 0.775 0.815 0.77 0.81 0.76 0.805 0.755 0.80 0.75 Charge= +/-2 Mg2+, Be2+ CH?(CH?CH?CO2)2, (CH?CH?CH?CO2-)2 Ca²+, Cu²+, Zn²+, Sn²+, Mn²+, Fe+2, Ni²+, Co+2, C6H4(CO2)2, H?C(CH?CO?)2, (CH?CH?CO2)2 Sr2+, Ba²+, Cd²+, Hg²+, S², S?04², WO4²-, H?C(CO?)2, (CH?CO?)2, (CHOHCO2)2 Pb2+ , CO 3” ,SO 3? , MoO ? , Co(NH 3 ) 5 C12+, Fe(CN) 5 NO 2-, C 20 4²-, Hcitrate 2- Hg?+, SO4², S?O3², S?O6², S?08², SeO4²-, CrO4²-, HPO4²- Charge= +/- 3 Al3+, Fe³+, Cr³+, Sc³+, Y³+, In³+, lanthanidesa citrate 3- PO4³-, Fe(CN)6³-, Cr(NH3)6³+, Co(NH3)6³+, Co(NH3)5H?O3+ Th4+, Zr4+, Ce+, Sn4+ Fe(CN)6 Charge = +/- 4 800 700 600 500 450 400 900 500 400 1100 500 0.872 0.755 0.872 0.755 0.870 0.749 0.868 0.867 0.744 0.742 0.867 0.740 0.738 0.54 0.728 0.51 0.725 0.505 0.588 0.35 0.57 0.31 Activity coefficient (y) 0.69 0.685 0.675 0.67 0.665 0.660 Activity coefficient (y) 0.445 0.405 0.395 Activity coefficient (y) 0.255 0.20 0.52 0.45 0.50 0.425 0.485 0.405 0.465 0.38 0.455 0.37 0.445 0.355 0.245 0.18 0.18 0.115 0.16 0.095 0.10 0.065 0.048 0.021