At what point is a base no longer added during a titration? A. when the pH increases suddenly in the flask

B. when the phenolphthalein remains clear in the flask

C. before the solution in the flask reaches the equivalency point

D. before half of the base is completely drained from the burette​

when the pH increases suddenly in the flask

Explanation:

I think it's right. :)

what are the statements

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.