Topic 1 - Acids and Alkalis

• The pH of a neutral substance is 7
• The pH of an alkaline substance ranges from 7 - 14
• The pH of an acidic substance ranges from 0-7
• What is at a pH of 1?

  Stomach acid
• What are some other acidic substances?

  Lemon juice, skin, vinegar
• What is at the pH of 14?

  Oven cleaner
• What are some other alkaline substances?

  Milk, indigestion powder, toothpaste, washing powder
• What colour does litmus turn if it comes in contact with an acid?

  Red
• What are some neutral substances?

  Distilled ( pure ) water
• What colour does litmus turn if it comes in contact with an alkali?

  blue
• What colour does litmus turn if it comes in contact with a neutral substance? ( with red litmus )

  red
• What colour does blue litmus turn if it comes in contact with a neutral substance?

  blue
• Most concentrated acids are corrosive
• Alkalis are soluble bases
• Neutralisation: Acid + alkali --> salt + water
• Solve this: Nitric acid + zinc oxide?

  zinc nitrate + water
• Thermal decomposition: copper carbonate -->?

  copper oxide + carbon dioxide