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Understanding Acids Worksheet
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Understanding Acids Worksheet
🧪 Part 1: Multiple Choice
1. What happens when an acid dissolves in water?
It releases hydrogen ions (H⁺)
It releases oxygen ions (O²⁻)
It releases sodium ions (Na⁺)
It releases chlorine ions (Cl⁻)
2. Which of the following is a common household acid?
Baking soda
Vinegar
Soap
Ammonia
3. On the pH scale, acids have a pH value that is:
Greater than 7
Equal to 7
Less than 7
Always exactly 1
4. Which properties are commonly associated with acids? (Select all that apply)
Sour taste (in edible acids)
React with metals
Feel slippery to touch
Can be corrosive
📝 Part 2: Short Answer Questions
5. Define what an acid is in your own words.
6. Explain why safety equipment (goggles and gloves) is important when handling acids in the laboratory.
7. Fill in the blanks:
When hydrochloric acid dissolves in water, it releases __________ ions. The stronger the acid, the __________ the pH value. Lemon juice has a pH of approximately ____, making it a __________ acid.
8. List three examples of acids you might find in your home and explain where each one is commonly found.
1. _________________________________________________
2. _________________________________________________
3. _________________________________________________
🔬 Part 3: Practical Application
9. You are given four unknown liquids with the following pH values: 2, 6, 8, and 12. Identify which ones are acids and explain your reasoning.
10. Describe what you would observe if you placed a piece of zinc metal into dilute hydrochloric acid. Explain why this reaction occurs.
11. Design a simple experiment to test whether an unknown liquid is an acid. List the materials you would need and the steps you would follow.
Materials needed: _________________________________
_________________________________________________
Steps:
1. _________________________________________________
2. _________________________________________________
3. _________________________________________________
4. _________________________________________________
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