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Chemistry
Chemistry
Problem
Balance the following equations: (a)
B
a
C
r
O
4
+
K
I
+
H
C
l
⟶
B
a
C
l
2
+
I
2
+
K
C
l
+
C
r
C
l
3
+
H
2
O
\mathbf{BaCrO_4 + KI + HCl \longrightarrow BaCl_2 + I_2 + KCl + CrCl_3 + H_2O}
BaCr
O
4
+
KI
+
HCl
⟶
BaC
l
2
+
I
2
+
KCl
+
CrC
l
3
+
H
2
O
(b)
S
O
2
+
N
a
2
C
r
O
4
+
H
2
S
O
4
⟶
N
a
2
S
O
4
+
C
r
2
(
S
O
4
)
3
+
H
2
O
\mathbf{SO_2 + Na_2CrO_4 + H_2SO_4 \longrightarrow Na_2SO_4 + Cr_2(SO_4)_3 + H_2O}
S
O
2
+
N
a
2
Cr
O
4
+
H
2
S
O
4
⟶
N
a
2
S
O
4
+
C
r
2
(
S
O
4
)
3
+
H
2
O
(c)
C
2
H
5
O
H
+
I
2
+
O
H
−
⟶
C
H
I
3
+
H
C
O
2
−
+
H
2
O
+
I
−
\mathbf{C_2H_5OH + I_2 + OH^- \longrightarrow CHI_3 + HCO_2^- + H_2O + I^-}
C
2
H
5
OH
+
I
2
+
O
H
−
⟶
CH
I
3
+
HC
O
2
−
+
H
2
O
+
I
−
(Basic)
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