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Chemistry
Chemistry
Problem
Fe
(
OH
)
2
\text{Fe}(\text{OH})_2
Fe
(
OH
)
2
is precipitated from
Fe
(
II
)
\text{Fe}(\text{II})
Fe
(
II
)
solutions as a white solid but turns dark green and then brown due to the formation of : a.
Fe
(
OH
)
2
\text{Fe}(\text{OH})_2
Fe
(
OH
)
2
and
Fe
(
OH
)
3
\text{Fe}(\text{OH})_3
Fe
(
OH
)
3
b. only
Fe
(
OH
)
3
\text{Fe}(\text{OH})_3
Fe
(
OH
)
3
c.
Fe
2
O
3
⋅
(
H
2
O
)
n
\text{Fe}_2\text{O}_3 \text{·} (\text{H}_2\text{O})_n
Fe
2
O
3
⋅
(
H
2
O
)
n
d.
Fe
2
O
3
⋅
2
H
2
O
\text{Fe}_2\text{O}_3 \text{·} 2\text{H}_2\text{O}
Fe
2
O
3
⋅
2
H
2
O
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