Perrier water has the following composition (millimole/liter, except for pH)):
Calcium (Ca2+ ) 3.725
Magnesium (Mg2+ ) 0.288
Sodium (Na+ ) 0.500
Potassium (K+ ) 0.035
Sulphate (SO42- ) 0.656
Bicarbonate (HCO3- ) 6.885
Chloride (Cl- ) 0.647
Nitrate (NO3- ) 0.080
pH 5.46
a. Are these analyses correct? (i.e. are the charges balanced?)
b. What partial pressure of CO2 would be at equilibrium with this water?