Problem 5.6: A water sample shows Palkalinity 80 ppm and
From Chapter 5 Problem Set. Level 2: Applied Thinking.
Question
A water sample shows P-alkalinity = 80 ppm and M-alkalinity = 240 ppm (both as CaCO₃). Which alkalinity species are present? Calculate the bicarbonate and carbonate alkalinity.
Answer
Show answer
½M = 120. Since P (80) < ½M (120), bicarbonate + carbonate are present. Carbonate alk = 2P = 160 ppm as CaCO₃. Bicarbonate alk = M − 2P = 240 − 160 = 80 ppm as CaCO₃.