If P is the amount of acid required to reach 8.3 and M is the total quantity of acid required to reach 4.5, Which of the following statements are true?
(i) P = M, all alkalinity is OH-
(ii) P = M/2, all alkalinity is \(\rm CO^{2-}_3\)
(iii) P > M/2, predominant species are \(\rm CO^{2-}_3\) and HCO3-
(iv) P < M/2, predominant species are OH- and \(\rm CO^{2-}_3\)
1
i and ii are correct
2
i and ii are wrong
3
iii and iv are correct
4
i is wrong and ii is correct