Chemistry

• How soap cleans

  Water alone can't lift grease or break open a flu virus. Soap does both, with a molecule that holds water at one end and grease at the other, and Nablus made it from olive oil and plant ash for centuries.

  • 7min read
  • 10min listen
  • 26questions
• Acids and bases

  One scale from battery acid to drain cleaner, and the truce called neutralisation.

  • 8min read
  • 10min listen
  • 34questions