The experimental data are listed in the tables below. Notes at the end of each one define the tabulated quantities, and identify the sources of the measurements.
Measurements have been made using the following electrochemical cells:
See Clegg et al. (S. L. Clegg, J. A. Rard, and K. S. Pitzer (1994) J. Chem. Soc., Faraday Trans. 90, 1875-1894) for details, including values of the standard EMFs for the cells. Equations relating solvent and solute activities to the measured EMF (E) and standard EMF (Eo) for each cell are given in the notes to the tables below.
mH2SO4 E T ref. weight 0.1003 0.73775 298.15 a 1.0 0.1745 0.72386 298.15 a 1.0 0.3877 0.70320 298.15 a 1.0 0.5530 0.69368 298.15 a 1.0 0.9776 0.67676 298.15 a 1.0 1.872 0.65345 298.15 a 1.0 3.911 0.61430 298.15 a 1.0 5.767 0.58474 298.15 a 1.0 7.972 0.55490 298.15 a 1.0 0.1003 0.73866 278.15 a 1.0 0.1745 0.72547 278.15 a 1.0 0.3877 0.70589 278.15 a 1.0 0.5530 0.69703 278.15 a 1.0 0.9776 0.68099 278.15 a 1.0 1.872 0.65837 278.15 a 0.0 3.911 0.61977 278.15 a 1.0 5.767 0.59538 278.15 a 0.0 7.972 0.55985 278.15 a 1.0 0.1003 0.73820 288.15 a 1.0 0.1745 0.72461 288.15 a 1.0 0.3877 0.70458 288.15 a 1.0 0.5530 0.69536 288.15 a 1.0 0.9776 0.67912 288.15 a 1.0 1.872 0.65582 288.15 a 1.0 3.911 0.61725 288.15 a 1.0 5.767 0.58717 288.15 a 1.0 7.972 0.55731 288.15 a 1.0 0.1003 0.73729 308.15 a 1.0 0.1745 0.72301 308.15 a 1.0 0.3877 0.70180 308.15 a 1.0 0.5530 0.69201 308.15 a 1.0 0.9776 0.67453 308.15 a 1.0 1.872 0.65065 308.15 a 1.0 3.911 0.61155 308.15 a 1.0 5.767 0.58203 308.15 a 1.0 7.972 0.55266 308.15 a 1.0 0.1003 0.73678 318.15 a 0.0 0.1745 0.72209 318.15 a 1.0 0.3877 0.70025 318.15 a 1.0 0.5530 0.69007 318.15 a 1.0 0.9776 0.67241 318.15 a 1.0 1.872 0.64776 318.15 a 0.0 3.911 0.60857 318.15 a 1.0 5.767 0.57920 318.15 a 1.0 7.972 0.55042 318.15 a 1.0 0.1003 0.73629 328.15 a 0.0 0.1745 0.72116 328.15 a 1.0 0.3877 0.69850 328.15 a 1.0 0.5530 0.68858 328.15 a 1.0 0.9776 0.67028 328.15 a 1.0 1.872 0.64491 328.15 a 0.0 3.911 0.60633 328.15 a 1.0 5.767 0.57614 328.15 a 0.0 7.972 0.54842 328.15 a 1.0
E = Eo - (RT/(2F))ln(mH2 × mSO4 × γH2 × γSO4)
where Eo is given in Table 6 of Clegg et al. (1994), prefix m indicates molality, γ(i) is the activity coefficient of species (i), R is the gas constant and F is Faraday's constant.mH2SO4 E T ref. weight 0.1000 1.56509 298.15 a 1.0 0.1085 1.56728 298.15 a 1.0 0.1996 1.58284 298.15 a 1.0 0.2917 1.59266 298.15 a 1.0 0.4717 1.60548 298.15 a 1.0 0.4717 1.60539 298.15 a 1.0 1.1290 1.63195 298.15 a 1.0 1.1290 1.63179 298.15 a 1.0 2.2170 1.65943 298.15 a 1.0 2.2170 1.65946 298.15 a 1.0 3.9000 1.69420 298.15 a 1.0 3.9000 1.69443 298.15 a 1.0 4.9730 1.71494 298.15 a 1.0 6.0950 1.73516 298.15 a 1.0 6.0950 1.73514 298.15 a 1.0 7.1990 1.75425 298.15 a 1.0 8.2720 1.77099 298.15 a 1.0 0.1000 1.57410 278.15 a 1.0 0.1996 1.59097 278.15 a 1.0 0.2917 1.60031 278.15 a 1.0 0.4717 1.61237 278.15 a 1.0 1.129 1.63738 278.15 a 1.0 2.217 1.66364 278.15 a 1.0 3.900 1.69856 278.15 a 1.0 4.973 1.71984 278.15 a 1.0 6.095 1.74035 278.15 a 1.0 7.199 1.75965 278.15 a 1.0 0.1000 1.57173 283.15 a 1.0 0.1996 1.58893 283.15 a 1.0 0.2917 1.59833 283.15 a 1.0 0.4717 1.61065 283.15 a 1.0 1.129 1.63606 283.15 a 1.0 2.217 1.66259 283.15 a 1.0 3.900 1.69743 283.15 a 1.0 4.973 1.71864 283.15 a 1.0 6.095 1.73891 283.15 a 1.0 7.199 1.75820 283.15 a 1.0 0.1000 1.56730 293.15 a 1.0 0.1996 1.58480 293.15 a 1.0 0.2917 1.59450 293.15 a 1.0 0.4717 1.60720 293.15 a 1.0 1.129 1.63336 293.15 a 1.0 2.217 1.66045 293.15 a 1.0 3.900 1.69524 293.15 a 1.0 4.973 1.71603 293.15 a 1.0 6.095 1.73640 293.15 a 1.0 7.199 1.75560 293.15 a 1.0 0.1000 1.56086 308.15 a 1.0 0.1996 1.57887 308.15 a 1.0 0.2917 1.58896 308.15 a 1.0 0.4717 1.60232 308.15 a 1.0 1.129 1.62948 308.15 a 1.0 2.217 1.65720 308.15 a 1.0 3.900 1.69212 308.15 a 1.0 4.973 1.71260 308.15 a 1.0 6.095 1.73285 308.15 a 1.0 7.199 1.75187 308.15 a 1.0 0.1000 1.55683 318.15 a 1.0 0.1996 1.57510 318.15 a 1.0 0.2917 1.58544 318.15 a 1.0 0.4717 1.59924 318.15 a 1.0 1.129 1.62701 318.15 a 1.0 2.217 1.65518 318.15 a 1.0 3.900 1.69013 318.15 a 1.0 4.973 1.71056 318.15 a 1.0 6.095 1.73073 318.15 a 1.0 7.199 1.74964 318.15 a 1.0 0.1000 1.55284 328.15 a 1.0 0.1996 1.57146 328.15 a 1.0 0.2917 1.58197 328.15 a 1.0 0.4717 1.59617 328.15 a 1.0 1.129 1.62455 328.15 a 1.0 2.217 1.65320 328.15 a 1.0 3.900 1.68826 328.15 a 1.0 4.973 1.70878 328.15 a 1.0 6.095 1.72856 328.15 a 1.0 7.199 1.74740 328.15 a 1.0
E = Eo + (RT/(2F))ln(mH2 × mSO4 × γH2 × γSO4 / aW2)
where Eo is given in Table 6 of Clegg et al. (1994), prefix m indicates molality, γ(i) is the activity coefficient of species (i), aW is the water activity, R is the gas constant and F is Faraday's constant.mH2SO4 E T Cell mPb mHg ref. weight 0.007283 1.49596 298.15 I 1.73E-5 - a 1.0 0.010316 1.50597 298.15 I 1.66E-5 - a 1.0 0.057097 1.55100 298.15 I - - a 1.0 0.095426 1.56379 298.15 I - - a 1.0 0.095677 1.56357 298.15 I - - a 1.0 0.007283 0.80615 298.15 II - 8.37E-4 a 1.0 0.010316 0.79678 298.15 II - 7.92E-4 a 1.0 0.017138 0.78310 298.15 II - 7.58E-4 a 1.0 0.021505 0.77685 298.15 II - 7.54E-4 a 1.0 0.040055 0.76053 298.15 II - 7.58E-4 a 1.0 0.057097 0.75158 298.15 II - 7.67E-4 a 1.0 0.084016 0.74187 298.15 II - 8.04E-4 a 1.0 0.095426 0.73880 298.15 II - 8.11E-4 a 1.0 0.095677 0.73865 298.15 II - 8.11E-4 a 1.0 0.0087905 0.80095 298.15 II - 8.10E-4 a 1.0 0.023612 0.77437 298.15 II - 7.54E-4 a 1.0 0.026077 0.77184 298.15 II - 7.54E-4 a 1.0 0.059169 0.75105 298.15 II - 7.69E-4 a 1.0
E = Eo + (RT/(2F))ln(mH2 × mSO4 × γH2 × γSO4 / aW2)
where Eo is given in Table 6 of Clegg et al. (1994). The measured EMF of Cell II is related to the activities of H+ and SO42− in solution by:
E = Eo - (RT/(2F))ln(mH2 × mSO4 × γH2 × γSO4)
where Eo is given in Table 6 of Clegg et al. (1994), prefix m indicates molality, γ(i) is the activity coefficient of species (i), aW is the water activity, R is the gas constant and F is Faraday's constant.mH2SO4 E T mHg ref. weight 0.0505538 0.7544 298.15 7.64E-4 a 1.0 0.137924 0.7290 298.15 8.40E-4 a 1.0 0.277480 0.7115 298.15 9.26E-4 a 1.0 0.559603 0.6929 298.15 1.02E-3 a 1.0 1.14138 0.6712 298.15 1.04E-3 a 1.0 1.75302 0.6555 298.15 9.53E-4 a 1.0 2.38580 0.6418 298.15 0.0 a 1.0
E = Eo - (RT/(2F))ln(mH2 × mSO4 × γH2 × γSO4)
where Eo is given in Table 6 of Clegg et al. (1994), prefix m indicates molality, γ(i) is the activity coefficient of species (i), R is the gas constant and F is Faraday's constant.mH2SO4 E T mHg ref. weight 0.0505703 0.7544 298.15 7.64E-4 a 1.0 0.504909 0.6960 298.15 1.01E-3 a 1.0 1.03129 0.6751 298.15 1.06E-3 a 1.0 3.63688 0.6187 298.15 0.0 a 1.0 8.20656 0.5506 298.15 0.0 a 0.0
E = Eo - (RT/(2F))ln(mH2 × mSO4 × γH2 × γSO4)
where Eo is given in Table 6 of Clegg et al. (1994), prefix m indicates molality, γ(i) is the activity coefficient of species (i), R is the gas constant and F is Faraday's constant.mH2SO4 E T mHg ref. weight 0.10 0.73714 298.15 8.12E-4 a 1.0 0.50 0.69609 298.15 1.01E-3 a 1.0 1.0 0.67600 298.15 1.05E-3 a 1.0 1.5 0.66213 298.15 9.97E-4 a 1.0 2.0 0.65088 298.15 9.09E-4 a 0.0 3.0 0.63041 298.15 0.D0 a 1.0 4.0 0.61201 298.15 0.D0 a 0.0
E = Eo - (RT/(2F))ln(mH2 × mSO4 × γH2 × γSO4)
where Eo is given in Table 6 of Clegg et al. (1994), prefix m indicates molality, γ(i) is the activity coefficient of species (i), R is the gas constant and F is Faraday's constant.mH2SO4 E T mHg ref. weight 0.002 0.84491 298.15 1.12E-3 a 0.0 0.005 0.81832 298.15 8.92E-4 a 0.0 0.008 0.80474 298.15 8.26E-4 a 0.0 0.01 0.79825 298.15 8.07E-4 a 0.0
E = Eo - (RT/(2F))ln(mH2 × mSO4 × γH2 × γSO4)
where Eo is given in Table 6 of Clegg et al. (1994), prefix m indicates molality, γ(i) is the activity coefficient of species (i), R is the gas constant and F is Faraday's constant.mH2SO4 E T mHg ref. weight 0.0050150 0.8162 298.15 8.923E-4 a 1.0 0.0250589 0.7738 298.15 7.512E-4 a 0.0 0.0502060 0.7546 298.15 7.641E-4 a 1.0 0.252900 0.7152 298.15 9.120E-4 a 0.0 0.510484 0.6952 298.15 1.006E-3 a 1.0 1.04077 0.6744 298.15 1.055E-3 a 1.0
E = Eo - (RT/(2F))ln(mH2 × mSO4 × γH2 × γSO4)
where Eo is given in Table 6 of Clegg et al. (1994), prefix m indicates molality, γ(i) is the activity coefficient of species (i), R is the gas constant and F is Faraday's constant.mH2SO4 E T mHg ref. weight 0.05355 0.7955 298.15 7.70E-4 a 1.0 0.1000 0.8264 298.15 8.10E-4 a 1.0 0.1035 0.8285 298.15 8.10E-4 a 1.0 0.2579 0.8747 298.15 9.10E-4 a 1.0 0.5154 0.9108 298.15 1.01E-3 a 0.0 1.036 0.9526 298.15 1.05E-3 a 0.0 1.065 0.9550 298.15 1.05E-3 a 1.0 1.964 1.0013 298.15 9.09E-4 a 1.0 2.206 1.0121 298.15 8.60E-4 a 1.0 3.499 1.0639 298.15 0.0 a 1.0
E = Eo + (RT/F)ln(mH2 × mSO4 × γH2 × γSO4 / aW)
where Eo is given in Table 6 of Clegg et al. (1994), prefix m indicates molality, γ(i) is the activity coefficient of species (i), R is the gas constant and F is Faraday's constant.mH2SO4 E T mPb ref. weight 0.0050 0.14745 298.15 1.89D-5 a 1.0 0.0100 0.16744 298.15 1.66D-5 a 1.0 0.0200 0.18637 298.15 1.52D-5 a 1.0 0.0050 0.14487 273.15 1.22E-5 a 0.0 0.0100 0.16443 273.15 1.07E-5 a 1.0 0.0200 0.18301 273.15 0.99E-5 a 0.0 0.0050 0.14622 285.65 1.53E-5 a 1.0 0.0100 0.16588 285.65 1.34E-5 a 1.0 0.0200 0.18467 285.65 1.24E-5 a 1.0 0.0050 0.14890 310.65 2.27E-5 a 1.0 0.0100 0.16909 310.65 1.99E-5 a 1.0 0.0200 0.18828 310.65 1.83E-5 a 1.0 0.0050 0.15037 323.15 2.73E-5 a 1.0 0.0100 0.17067 323.15 2.38E-5 a 1.0 0.0200 0.19004 323.15 2.20E-5 a 1.0
E = Eo + (RT/(2F))ln(mH2 × mSO4 × γH2 × γSO4)
where Eo is given in Table 6 of Clegg et al. (1994), prefix m indicates molality, γ(i) is the activity coefficient of species (i), R is the gas constant and F is Faraday's constant.