Which statement is incorrect about oxoacids of the halogens? a) HCIO4 is stable b) HOCI and HOBr are oxidizing agent c) HCIO4 and HCIO3 behave as weak acids in aqueous solution d) Aqueous HIO3 is relatively strong acid
Answers
Answer:
The acidic strength of oxyacids of chlorine are HClO< HClO2< HClO3< HClO4
Answer:
(A) The central atom in both HClO
4
and HClO is sp
3
hybridized. The central Cl atom in HClO
4
has 4 bonding domains and zero lone pairs of electrons.
The central O atom in HClO has 2 bonding domains and 2 lone pairs of electrons.
(B) The conjugate base of HClO
4
is weaker base than H
2
O. This is because HClO
4
is stronger acid than water. A stronger acid has weaker conjugate base and vice versa.
(D) HClO
4
is more acidic than HClO because of the resonance stabilization of its anion. Greater is the extent of delocalisation, greater is the stabilisation of negative charge and higher is the acidity. In HClO
4
, negative charge is delocalised over 4O atoms.
The following statement is incorrect.
(C) HClO
4
is formed in the reaction between Cl
2
and H
2
O."
Instead, the following methods are used.
NaClO
4
+HCl→NaCl+HClO
4
Laboratory preparations of HClO
4
include the following
Treatment of barium perchlorate with sulfuric acid to give barium sulfate and perchloric acid.
Nitric acid is mixed with ammonium perchlorate to form nitrous oxide and perchloric acid
Video Explanation
Solution to Question ID 640506