Statement I: Higher order ionisation constant (Ka2,Ka3 are smaller than the lower order ionisation constant (Ka1) of a polyprotic acid.Statement II: It is more difficult to remove a positively charged proton from a negative ion due to electrostatic forces.

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

Both statements I and II are correct.

Statement I is incorrect and statement II is correct.

Statement I is correct and statement II is incorrect.

Both statements I and II are incorrect.

answer is A.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

Higher order ionisation constants Ka2,Ka3 are smaller than the lower order ionisation constani (Ka1) of a polyprotic acid. The reason for this is that it is more difficult to remove a positively charged proton from a negative ion due to electrostatic forces. This can be seen in the case of removing a proton from the uncharged H2CO3 as compared from a negatively charged HCO3-.Similarly, it is more difficult to remove a proton from a doubly charged HPO42- anion as compared to H2PO4-.

Watch 3-min video & get full concept clarity