Question

3. The mineral analvsis below was reported for a water sample. Note: All reported as " mg/L as ion" unless stated otherwise. a. Convert all the ions into units of mg/L as CaCO _3​

. b. Draw a bar chart that includes all the ions listed above. c. What is the total hardness of the water in mg/L as CaCO _3
? d. What is the carbonate hardness of the water in mg/L as CaCO _3
? e. What is the non-carbonate hardness of the water in mg/L as CaCO _3​ ?

Answer 1

a. ) Conversion of ions into mg/L as CaCO3:

• Ca2+: 74 mg/L as CaCO3
• Mg2+: 48.4 mg/L as CaCO3
• Na+: 20 mg/L as CaCO3
• K+: 2.5 mg/L as CaCO3
• HCO3-: 178.8 mg/L as CaCO3
• CO32-: 0 mg/L as CaCO3
• Cl-: 0 mg/L as CaCO3
• SO42-: 0 mg/L as CaCO3
• NO3-: 0 mg/L as CaCO3

• SiO2: 0 mg/L as CaCO3

b. ) Total hardness of the water: 122.4 mg/L as CaCO3

c. ) Carbonate hardness of the water: 0 mg/L as CaCO3

d. ) Non-carbonate hardness of the water: 122.4 mg/L as CaCO3