Question: 4 identify which of the possible unknowns for this experiment...

4. Identify which of the possible unknowns for this experiment would give the following behavior.

• A clear, colorless solution of the unknown tested acidic to indicator paper.

• Testing with indicator paper indicate that the solution had an acidic pH.
• Nothing was observed when KOH was added to the first test tube.
• Nothing was observed when AgNO₃(aq) was added to the second test tube.
• A white precipitate formed when BaCl₂(aq) was added to the third test tube.

(Note that under the conditions used in our lab experiment, Ag₂SO₄ does not form a precipitate.) Write a balanced molecular equation including states of matter for the reaction observed between this compound and BaCl₂.