当K,9·c(B)≥20K时， c90D=-++4$9 2 当c(HB)/K,≥500，K,·c(B)≥20Ke时 cea(0Hr)/c9={c(B)·K,°/c}1/2当c(HB)/Kb θ≥500，Kb θ·c(B)≥20Kw θ时 c eq(OH-)/cθ= {c(B)·Kb θ/cθ} 1/2 当Kb θ·c(B)≥20Kw 0时, = + 2 Kb + 4 c B  Kb  (Kb   )  c eq (OH - ) c  c 