Crossword puzzle on acids, bases, and salts with lemon imagery.

This crossword puzzle focuses on acids, bases, and salts. Below is the solution along with explanations for each clue.

Across:

1. 2. A substance that releases hydroxide ions into water. (4)
- Answer: Base
- Explanation: Bases release hydroxide ions (\(OH^-\)) when dissolved in water.

2. 5. The strength of an acid. (7)
- Answer: Acidity
- Explanation: Acidity refers to how strong or weak an acid is, often measured by pH.

3. 6. One of the products when you add an acid to a base. (5)
- Answer: Salt
- Explanation: When an acid reacts with a base, one of the products is a salt.

4. 9. Acid found in your stomach. (12)
- Answer: Hydrochloric Acid
- Explanation: Hydrochloric acid (\(HCl\)) is the primary acid found in stomach acid.

5. 12. The process of adding acids to bases. (14)
- Answer: Neutralization
- Explanation: Neutralization is the reaction between an acid and a base to form water and a salt.

6. 14. One of the products of adding an acid to a base. (4)
- Answer: Water
- Explanation: When an acid reacts with a base, water is one of the products.

7. 16. A solid substance composed of positive and negative ions. (7)
- Answer: Crystal
- Explanation: Crystals are solid substances formed by the regular arrangement of positive and negative ions.

Down:

1. 1. A substance that releases hydrogen ions into water. (4)
- Answer: Acid
- Explanation: Acids release hydrogen ions (\(H^+\)) when dissolved in water.

2. 2. How bases usually taste. (6)
- Answer: Bitter
- Explanation: Bases typically have a bitter taste.

3. 3. How acids usually taste. (4)
- Answer: Sour
- Explanation: Acids usually have a sour taste.

4. 4. An ion formed when a hydrogen ion combines with a water molecule. (9)
- Answer: Hydronium Ion
- Explanation: When a hydrogen ion (\(H^+\)) combines with a water molecule (\(H_2O\)), it forms a hydronium ion (\(H_3O^+\)).

5. 7. Color of litmus paper in bases. (4)
- Answer: Blue
- Explanation: Litmus paper turns blue in basic solutions.

6. 8. Scale used to measure acidity and alkalinity. (2)
- Answer: pH
- Explanation: The pH scale measures how acidic or basic a solution is, ranging from 0 to 14.

7. 10. A substance used as an acid-base indicator. (6)
- Answer: Indicator
- Explanation: Indicators like litmus paper change color to show whether a solution is acidic or basic.

8. 11. An atom or molecule with a positive or negative charge. (3)
- Answer: Ion
- Explanation: Ions are atoms or molecules that have gained or lost electrons, giving them a net positive or negative charge.

9. 13. The strength of a base. (10)
- Answer: Alkalinity
- Explanation: Alkalinity refers to how strong or weak a base is, similar to acidity for acids.

10. 15. Common name for sodium hydroxide. (3)
- Answer: Lye
- Explanation: Sodium hydroxide (\(NaOH\)) is commonly known as lye.

11. 17. Color of litmus paper in acids. (3)
- Answer: Red
- Explanation: Litmus paper turns red in acidic solutions.

Filled Crossword Puzzle:

```
Across:
2. Base
5. Acidity
6. Salt
9. Hydrochloric Acid
12. Neutralization
14. Water
16. Crystal

Down:
1. Acid
2. Bitter
3. Sour
4. Hydronium Ion
7. Blue
8. pH
10. Indicator
11. Ion
13. Alkalinity
15. Lye
17. Red
```

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