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Chemistry
Chemistry
Problem
In basic medium
CrO
4
2
−
\text{CrO}_4^{2-}
CrO
4
2
−
oxidises
S
2
O
3
2
−
\text{S}_2\text{O}_3^{2-}
S
2
O
3
2
−
to form
SO
4
2
−
\text{SO}_4^{2-}
SO
4
2
−
and itself changes into
Cr
(
OH
)
4
−
\text{Cr}(\text{OH})_4^-
Cr
(
OH
)
4
−
. The volume of
0.154
M CrO
4
2
−
0.154\text{M CrO}_4^{2-}
0.154
M CrO
4
2
−
required to react with
40
mL
40\text{ mL}
40
mL
of
0.25
M S
2
O
3
2
−
0.25\text{M S}_2\text{O}_3^{2-}
0.25
M S
2
O
3
2
−
is _____ mL. (Rounded - off to the nearest integer)
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