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Chemistry
Chemistry
Problem
In the equilibrium
H
S
−
(
a
q
)
+
H
P
O
4
2
−
(
a
q
)
⇌
S
2
−
(
a
q
)
+
H
2
P
O
4
−
(
a
q
)
HS^{-}(aq)+HPO_4^{2-}(aq)\rightleftharpoons S^{2-}(aq)+H_2PO_4^{-}(aq)
H
S
−
(
a
q
)
+
H
P
O
4
2
−
(
a
q
)
⇌
S
2
−
(
a
q
)
+
H
2
P
O
4
−
(
a
q
)
, which species functions as the Brønsted–Lowry base in the forward direction? a)
S
2
−
S^{2-}
S
2
−
b)
H
P
O
4
2
−
HPO_4^{2-}
H
P
O
4
2
−
c)
H
S
−
HS^{-}
H
S
−
d)
H
2
P
O
4
−
H_2PO_4^{-}
H
2
P
O
4
−
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