For a solution having .0025 equivalents/liter total alkalinity (contributions from HCO3- (negative one charge), CO3-- (negative two charge) and OH- (hydroxide)) at [H+] = 4.69E-11, what is the percentage contribution to alkalinity from CO3-- (negative two charge)?
A hint was given: Calculate the bicarbonate concentration and the contribution of the bicarbonate to the total alkalinity.
*** I have worked this problem several times trying several different approaches, so can you PLEASE work the problem out for me to understand how you derived the solution. Thanks.