Chapter 20

Template:Chapter Stone Road (STONE (ストーン) ROAD (ロード) , Sutōn Rōdo) is the twentieth chapter of the Dr. Stone manga

Summary

Senku and the rest decide to make Sulfonamide. Chapter 20 page 10

1. Electricity
   • Start with Iron
   • Powerful Magnets
   • Copper
   • Phosporus
2. 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
3. Ammonia
   • Urine
4. Aniline
   • Coal
5. Sodium Bicarbonate
   • Alcohol (Carbonation) = Sodium Bicarbonate
6. 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.