問題詳情
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)
參考答案
答案：D
難度：困難0.39759
統計：A(4),B(22),C(24),D(33),E(0)