Which reactions performed in the experiment involved chemical changes?
How did the experiement with boiling water compare with the experiment in which magnesium was added to hydrochloric acid?
Refer back to your data. List all indicators of chemical change that you observed.
gas, temperature changes.
Check all changes that you listed.
How did the experiement with the iron filings and sulfur compare with the experiment in which copper(II) sulfate pentahydrate was heated?
Which real-world scenarios below represent physical changes? Check all that apply.
Another real-world example of a change is rust. Rust is iron(III) oxide (Fe2O3), which results when iron is exposed to oxygen and water. What are some indicators of rusting? Check all that apply.
Therefore, rust is a physical✔ chemicalphysical AND chemical change.
Based on the results of this lab, write a short paragraph that summarizes how to distinguish physical changes from chemical changes.
To distinguish between physical and chemical changes, look for evidence of new substances being formed. A physical change involves a change in the state or appearance of a substance, such as melting ice or dissolving sugar, without changing its chemical identity. In contrast, a chemical change results in the formation of new products, often indicated by signs such as a change in color, the production of a gas (bubbles), the formation of a precipitate, or a change in temperature (release or absorption of energy). Unlike most physical changes, chemical changes are generally difficult to reverse.
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