First slide

Water and Heavy water

Question

Which of the following acid is formed when ${SiF}_{4}$ reacts with water ?

Moderate

A

${SiF}_{4}$
B

$H_{2} {SiF}_{4}$
C

$H_{2} {SiOF}_{4}$
D

$H_{2} {SiF}_{6}$

Solution

Silicon tetra fluoride on hydrolysis furnish ortho silicic acid and hydrogen silico fluoride.
$\underset{(Silicon tetra Fluoride)}{3 {SiF}_{4}} + \underset{(Water)}{4 H_{2} O} \overset{}{\to} \underset{(Ortho Silicic acid)}{H_{2} {SiO}_{4}} + \underset{(Hydrogen Silico Fluoride)}{2 H_{2} {SiF}_{4}}$

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