Acids and bases

• Acids

  • less than 7 on ph scale
  • turn litmus paper from blue to red
• Bases

  • more than 7 on ph scale
  • turn litmus’s paper red to blue
  • alkali= base that’s soluble in water
• Indicator= shows the colour change of whether it’s an acid or base
• Ph is measured=using litmus paper or a ph sensor
• Number 7 = neutral
• Everyday bases

  1. toothpaste
  2. boeach
  3. indigestion tablets
• Lab bases

  1. sodium hydroxide (NaOH)
  2. calcium carbonate (CaCO3)
  3. limewater Ca(OH)2
• Everyday acids

  1. lemon juice (citric)
  2. rain water (carbonic)
  3. vinegar (ethaonic)
• Lab acids

  1. hydrochloric acid (HCI)
  2. sulfuric acid (H2SO4)