4.3 - Unveiling Chemical Reactions: Evidence of Change
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Practice Questions
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What is one indicator of a chemical reaction?
💡 Hint: Think about what happens when an antacid is dropped in water.
What do we call a solid that forms from a liquid solution during a chemical reaction?
💡 Hint: This is often cloudy at first before settling.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is a sign of a chemical reaction?
💡 Hint: Consider something you might see in a fizzy drink.
True or False: A precipitate is always visible immediately when two solutions are mixed.
💡 Hint: Think about your observations in the lab or kitchen.
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Challenge Problems
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You notice a metal object is getting warmer to touch while it reacts with an acid. Explain the type of chemical reaction that might be taking place.
💡 Hint: Think about reactions involving acids and metals.
During a lab experiment, you mix two colorless solutions, and a yellow solid develops after several minutes. How would you report your observation regarding the chemical changes?
💡 Hint: Consider the characteristics of precipitate formation.
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