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?
K
+
+
?
Cr
2
O
7
2-
+
?
Cl
-
+
?
H
+
→
?
K
+
+
?
Cr
+
?
O
H
-
+
?
Cl
2
+
?
H
2
O
Error: Error in balancing the equation: There is an infinite amount of solutions.