阿摩線上測驗
50.某一自來水含 200mg/L (as CaCO3)鹼度，pH 值為 7.5，經由 H2CO3 之解離式子與其解離常數計算得知 ［CO32-］= 5.93×10-6 (eq/L)，［HCO3-］=3.99×10-3 (eq/L)，則其 M 鹼度為多少？
(A) 0.18 (mg/L as CaCO3)
(B) 12.9 (mg/L as CaCO3)
(C) 31.6 (mg/L as CaCO3)
(D) 199.5 (mg/L as CaCO3)
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統計： A(29), B(90), C(116), D(373), E(0) #1440163
統計： A(29), B(90), C(116), D(373), E(0) #1440163