수질분석결과 Na+ = 10 mg/L, Ca2+ = 20 mg/L, Mg2+ = 24 mg/L, Sr2+ = 2.2 mg/L 일 때 총경도는? (단, Na : 23, Ca : 40, Mg : 24, Sr : 87.6)
112.5mg/L as CaCO3
132.5mg/L as CaCO3
152.5mg/L as CaCO3
172.5mg/L as CaCO3
수질분석결과 Na+ = 10 mg/L, Ca2+ = 20 mg/L, Mg2+ = 24 mg/L, Sr2+ = 2.2 mg/L 일 때 총경도는? (단, Na : 23, Ca : 40, Mg : 24, Sr : 87.6)
A. 112.5mg/L as CaCO3
B. 132.5mg/L as CaCO3
C. 152.5mg/L as CaCO3
D. 172.5mg/L as CaCO3