Question

Sakura tested the pH of several solutions. Which substances are acidic? Check all that apply.

cola-flavored soda: 2.6
cranberry juice: 2.9
dish soap: 7.3
pickle juice: 5.5
seawater: 8.0
lye soap: 13.0

Answer 1

To determine which substances are acidic, we can refer to the pH scale. A pH value less than 7 indicates an acidic solution, while a pH of 7 is neutral, and anything above 7 is considered basic (alkaline).

Based on the pH values you provided:

- **cola-flavored soda: 2.6** (acidic)
- **cranberry juice: 2.9** (acidic)
- **dish soap: 7.3** (neutral to basic)
- **pickle juice: 5.5** (acidic)
- **seawater: 8.0** (basic)
- **lye soap: 13.0** (basic)

Therefore, the substances that are acidic are:

- Cola-flavored soda
- Cranberry juice
- Pickle juice