
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system

In 8 numbered test tubes are solutions of the following compounds: nitric, hydrochloric, sulfuric acids, ammonium hydroxide, copper and barium chlorides, copper sulfate, and silver nitrate. Arrange them in the necessary order, given:

- Solution 1 forms precipitates with 3 and 5, and at higher concentrations with 4;
- The precipitates formed when solution 1 is mixed with solutions 4 and 5 are soluble in excess 5. Additionally, the precipitate 1 with 5 is soluble in 6, 7, and 8;
- Solution 2 forms precipitates with 4 and 5, soluble in excess 5. Additionally, the precipitate 2 with 5 is soluble in 6, 7, and 8;
- Solution 3 forms precipitates with 1, 4, and 8. The precipitate 3 with 4 is soluble in 5;
- Solution 4 forms precipitates with 2, 5, and 7, and at higher concentrations with 1 and 8. All of them are soluble in excess 5.

Confirm your reasoning with molecular or simplified ionic equations of the reactions.

Present the answer in LaTex format: \boxed{Your answer}
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