1) Calculate the following:

Ca+2 = 36.8mg/L

Mg+2 = 2.9mg/L

HCO3 = 98mg/L

pH = 7.53

Temp = 9C

1. a. Hardness in units of mg/L as CaCO₃
2. b. Ionic strength (be sure to include H⁺₊ and OH^-_-)
3. c. P_CO2 in equilibrium with the sample
4. d. Saturation index with respect to calcite (SI_C)
5. e. Saturation index with respect to dolomite (SI_D)