To solve the problem, we need to determine whether each statement describes
Acids,
Bases, or
Both. Let's analyze each statement step by step:
---
1. Taste sour.
-
Acids have a sour taste (e.g., vinegar, lemon juice).
-
Bases do not taste sour; they often taste bitter.
-
Answer: Acid
---
2. Feel slippery.
-
Bases often feel slippery when touched (e.g., soap, lye).
-
Acids do not typically feel slippery.
-
Answer: Base
---
3. pH less than 7.
-
Acids have a pH less than 7.
-
Bases have a pH greater than 7.
-
Answer: Acid
---
4. Strong electrolytes.
- Both
acids and
bases can be strong electrolytes (e.g., HCl is a strong acid, NaOH is a strong base).
-
Answer: Both
---
5. React with metals to produce hydrogen gas.
-
Acids react with active metals to produce hydrogen gas (e.g., Zn + 2HCl → ZnCl₂ + H₂).
-
Bases do not react with metals in this way.
-
Answer: Acid
---
6. Electrical conductivity.
- Both
acids and
bases conduct electricity because they dissociate into ions in solution.
-
Answer: Both
---
7. Produce hydronium ions when dissolved in water.
-
Acids produce hydronium ions (H₃O⁺) when dissolved in water.
-
Bases do not produce hydronium ions; they produce hydroxide ions (OH⁻).
-
Answer: Acid
---
8. Turn blue litmus paper red.
-
Acids turn blue litmus paper red.
-
Bases do not turn blue litmus paper red; they turn it blue.
-
Answer: Acid
---
9. pH greater than 7.
-
Bases have a pH greater than 7.
-
Acids have a pH less than 7.
-
Answer: Base
---
10. Taste bitter.
-
Bases often taste bitter (e.g., baking soda, ammonia).
-
Acids do not taste bitter; they taste sour.
-
Answer: Base
---
11. Can burn skin.
- Both
acids and
bases can be corrosive and burn skin if concentrated (e.g., H₂SO₄, NaOH).
-
Answer: Both
---
12. Produce hydrogen ions when dissolved in water.
-
Acids produce hydrogen ions (H⁺) when dissolved in water.
-
Bases do not produce hydrogen ions; they produce hydroxide ions (OH⁻).
-
Answer: Acid
---
13. Turn red litmus paper blue.
-
Bases turn red litmus paper blue.
-
Acids do not turn red litmus paper blue; they turn it red.
-
Answer: Base
---
14. Can be weak electrolytes.
- Both
acids and
bases can be weak electrolytes (e.g., acetic acid, ammonia).
-
Answer: Both
---
15. Turn phenolphthalein pink.
-
Bases turn phenolphthalein pink.
-
Acids do not turn phenolphthalein pink; they keep it colorless.
-
Answer: Base
---
Final Answer:
1. Acid
2. Base
3. Acid
4. Both
5. Acid
6. Both
7. Acid
8. Acid
9. Base
10. Base
11. Both
12. Acid
13. Base
14. Both
15. Base
Boxed Answer:
\[
\boxed{
\begin{array}{ll}
1. & \text{Acid} \\
2. & \text{Base} \\
3. & \text{Acid} \\
4. & \text{Both} \\
5. & \text{Acid} \\
6. & \text{Both} \\
7. & \text{Acid} \\
8. & \text{Acid} \\
9. & \text{Base} \\
10. & \text{Base} \\
11. & \text{Both} \\
12. & \text{Acid} \\
13. & \text{Base} \\
14. & \text{Both} \\
15. & \text{Base} \\
\end{array}
}
\]
Parent Tip: Review the logic above to help your child master the concept of identifying acids and bases worksheet.
