Based on the substances listed, the most basic one is hand soap.
- Soda pop is typically slightly acidic due to the presence of carbonic acid and phosphoric acid.
- Spit is slightly acidic to neutral depending on various factors, but generally, it has a pH around 6-7.
- Battery acid (sulfuric acid) is highly acidic.
Hand soap usually has a higher pH, making it more basic compared to the other substances mentioned.
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