Two clear colorless aqueous electrolyte solutions are mixed in a test tube. The solution turns from colorless to pink wh

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Two clear colorless aqueous electrolyte solutions are mixed in a
test tube. The solution turns from
colorless to pink when the indicator phenolphthalein is added. When
a conductance apparatus is dipped
in the solution, it tests positive as a strong electrolyte. What
can we say about the sample and how it
changed?
Homogenous mixture of compounds that underwent a physical
change
Homogeneous mixture of compounds that underwent a chemical
change
Heterogenous mixture of compounds that underwent a physical
change
Heterogeneous mixture of compounds that underwent a chemical
change