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Senku and the rest decide to make Sulfonamide. Chapter 20 page 10
- Electricity
- Start with Iron
- Powerful Magnets
- Copper
- Phosporus
- Chlorosulfuric Acid
- Salt + Sulfuric Acid = Hydrochloric Acid
- Salt + Electricity = Sodium Hydroxide
- Sulfuric Acid + Sodium Hydroxide = Sodium Hydrogen Sulfate
- Hydrochloric Acid + Sodium Hydrogen Sulfate = Chlorosulfuric Acid
- Ammonia
- Urine
- Aniline
- Coal
- Sodium Bicarbonate
- Alcohol (Carbonation) = Sodium Bicarbonate
- Acetic Anhydride
- Alcohol to Vinegar = Acetic Anhydride
Chrome and Kohaku learns the earth is rotating. Then Senku pointed out the "north star" but according to Kohaku and Chrome (using a magnet), that is not north based on perception. So Senku realized that his trip to Hagone was off since the planet's axis has titled in 5739 years.