From the expression for K, Equation 3.15.17, it may be seen that the degree to which
PbCO3 is solubilized as PbT - depends upon the concentration of HCO3-. Although
this concentration will vary appreciably, the figure commonly used to describe natural
waters is a bicarbonate ion concentration of 1.00 ´ 10-3, as shown in Section 3.9.
Using this value the following may be calculated