Question

$PC{l}_3$ and cold water reacts to produce which of the following?

• A. $H_{3}P{O}_3$
• B. $H_{3}P{O}_2$
• C. $H_4{P}_2{O}_7$
• D. $H_{3}P{O}_4$

Answer 1

Answer: (A)

$PC{l}_3$ and cold water reacts to produce orthophosphorous acid (phosphorous acid) $H_{3}P{O}_3$
$PC{l}_3+2HOH⟶H_{3}P{O}_3+3HCl$