Plz solve 17 and 19

# Doubt from ionic equilibrium

Is it 17,19 or 18,19

17 and 19

beutiful solution but their r shortcuts to find ph mixture of weak acid type question.

means directly u can remember formula talking on the basis of exam point of view..

Thanks @Sneha_2021 for reminding me I actually forgot the formula.

Yes in exam point we should use formulas

Yeah got it, formula was important btw. ..

Plz solve 19 as well....

It involves some approximations after second dissociation which Iam not clear of .

But the concept remains same like H+ is contributed in all dissociations and write equations.

Will check and soon say you

@Shwetanshu_2018 pls check this .

again formula based question

ph=pk1+pk2/2

then common ion effect concept..

based on concept of ph amphoteric acid..

Can you share the derivations if you have because I don't know this formula?

will post it tommrow..

Very nice explanation, thank you ..