Explanation:
Let's go through each item one by one to figure out if it describes an acid, a base, or both. We’ll use what we know about the properties of acids and bases.
1. Taste sour
- Acids taste sour. For example, lemon juice is sour because it’s acidic.
→ Acid
2. Feel slippery
- Bases feel slippery. Think of soap, which is a base.
→ Base
3. pH less than 7
- Acids have a pH less than 7.
→ Acid
4. Strong electrolytes
- Both acids and bases can be strong electrolytes because they break apart into ions in water. For example, hydrochloric acid (HCl) and sodium hydroxide (NaOH) are both strong electrolytes.
→ Both
5. React with metals to produce hydrogen gas
- Acids react with metals to make hydrogen gas. For example, vinegar (acid) and zinc make bubbles.
→ Acid
6. Electrical conductivity
- Both acids and bases conduct electricity when dissolved in water because they produce ions.
→ Both
7. Produce hydroxide ions when dissolved in water
- Bases produce hydroxide ions (OH⁻). For example, NaOH dissolves into Na⁺ and OH⁻.
→ Base
8. Turn blue litmus paper red
- Acids turn blue litmus paper red.
→ Acid
9. pH greater than 7
- Bases have a pH greater than 7.
→ Base
10. Taste bitter
- Bases taste bitter. For example, baking soda tastes bitter.
→ Base
11. Can burn skin
- Strong bases can burn skin. For example, lye (a base) is very caustic.
→ Base
12. Produce hydrogen ions when dissolved in water
- Acids produce hydrogen ions (H⁺). For example, HCl becomes H⁺ and Cl⁻.
→ Acid
13. Turn red litmus paper blue
- Bases turn red litmus paper blue.
→ Base
14. Can be weak electrolytes
- Both weak acids and weak bases are weak electrolytes because they don’t fully break apart in water.
→ Both
15. Turn phenolphthalein pink
- Bases turn phenolphthalein pink.
→ Base
Final Answer:
1. Acid
2. Base
3. Acid
4. Both
5. Acid
6. Both
7. Base
8. Acid
9. Base
10. Base
11. Base
12. Acid
13. Base
14. Both
15. Base
Parent Tip: Review the logic above to help your child master the concept of acid base worksheet.
