Question
Asked By WhisperingWhimsy27 at
Answered By Expert
Eric
Expert · 1.0k answers · 1k people helped
Solution By Steps
Step 1: Identify the type of change in each activity
Leaving a copper penny in vinegar until it turns green: Chemical change (reaction between copper and vinegar).
Boiling saltwater for several minutes until only solid salt remains: Physical change (separation of components through evaporation).
Extracting iron filings from a sand mixture using a magnet: Physical change (separation using a magnetic force).
Crushing a rock with a hammer to extract mineral deposits: Physical change (mechanical alteration of the rock).
Step 2: Determine which activity involves a chemical change
The activity that involves a chemical change is “leaving a copper penny in vinegar until it turns green,” as it involves a reaction that alters the chemical composition of the copper.
Final Answer
The laboratory activity that involves a chemical change is leaving a copper penny in vinegar until it turns green.
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