Permanent hardness due to Mg2+ ions is best removed by
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
a
CaOH2
b
Na2CO3
c
Na2CO3 + CaOH2
d
None of these
answer is C.
(Unlock A.I Detailed Solution for FREE)
Best Courses for You
JEE
NEET
Foundation JEE
Foundation NEET
CBSE
Detailed Solution
CaOH2 removes the permanent hardness due to Mg2+ ion, but it produces Ca2+ ions which are removed by Na2CO3.Mg2+ + CaOH2 → MgOH2 ↓ + Ca2+Ca2+ + Na2CO3 → CaCO3 ↓ + 2Na+CaOH2 or Na2CO3 alone cannot remove the permanent hardness.