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Please help me answer this question

Please help me answer this question-example-1
User Max Sohrt
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Electrolytes are observed by conductivity. unknown 2 should be circled, and Tap Water.

User James Lucas
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Answer:

Electrolytes are observed by conductivity - so unknown 2 should be circled, and Tap Water, which almost always contains electrolytes, mineral salts in solution.

Step-by-step explanation:

User Bowserm
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