A water sample has 122 mg/L of bicarbonate ion (HCO3-), 30 mg/L of carbonate ion (CO3-). a. Please find the pH at equilibrium graphically. b. How would pH change if NaOH is added? c. What is the pH range corresponding to molar HCO3- concentration being 10 times higher than and equal to molar CO3- concentration. H: 1 g/mole, C: 12 g/mole, O: 16 g/mole Ka1 = 10^(-6.35) , Ka2 = 10^(-10.33) please solve it step by step.