DATABASE C:\Program Files\USGS\Phreeqc Interactive 2.6\phreeqc.dat
# IS.11. Exercise
SOLUTION 1 
    temp      25
    pH        4.5
    pe        4
    redox     pe
    units     mg/l
    density   1
    Ca        0.384
    Mg        0.043
    Na        0.141
    K         0.036
    C(4)      1 CO2(g)     -3.5
    Cl        0.236
    S(6)      1.3
    N(5)      0.237
    N(-3)     0.208
    P         0.0003
    -water    1 # kg
END