Question
How would your prepare the following: (i) H3PO3, (ii) HI, (iii) HClO4.
Solution
i)Phosphorous acid can be form as
PCl3 +3H2O (cold) →H3PO3
(ii)HI formed by the reaction of I2 with hydrazine which also yield nitogen gas.
2I2+N2H4→ 4HI +N2
iii) sodium hypochlorite react with hydrochloric acid to give perchloric acid.
NaClO4 +HCl →NaCl +HClO