Acids and Alkalis

Cards (29)

  • What is an indicator?
    A dye that changes color
  • How does the dye in an indicator function?
    It changes color based on pH levels
  • What does an indicator show when testing a solution?
    The pH of the solution
  • What are the types of indicators mentioned?
    1. Universal indicator
    2. Litmus paper
    3. Phenolphthalein
    4. Methyl orange
  • What does a universal indicator do?
    It combines dyes to show various colors
  • How do you find the pH of an aqueous solution using an indicator?
    Add the indicator to the solution
  • What color does litmus paper turn in acidic solutions?
    Red
  • What color does litmus paper turn in alkaline solutions?
    Blue
  • What color does phenolphthalein turn in acidic solutions?
    Colorless
  • What color does phenolphthalein turn in alkaline solutions?
    Pink
  • What color does methyl orange turn in acidic solutions?
    Red
  • What color does methyl orange turn in neutral solutions?
    Yellow
  • What color does methyl orange turn in alkaline solutions?
    Yellow
  • What pH do acids have?
    Less than 7
  • What pH do bases have?
    Greater than 7
  • What is the reaction between an acid and a base called?
    Neutralization reaction
  • What happens during neutralization?
    An acid donates protons to a base
  • What is produced in a neutralization reaction?
    Water and a salt
  • What is the pH of neutral solutions?
    7
  • What do acids and bases produce when they react?
    Neutral solutions with pH of 7
  • How can you represent neutralization in terms of ions?
    H<sup>+</sup> + OH<sup>-</sup>H₂O
  • What are acid-base reactions sometimes called?
    Acid-base reactions
  • What do acid-base reactions involve?
    Proton transfer between acid and base
  • What happens to the pH when an acid neutralizes a base?
    The pH becomes neutral at 7
  • What is the role of acids in neutralization?
    They donate protons to bases
  • What is the role of bases in neutralization?
    They accept protons from acids
  • What is the result of an acid donating protons?
    It forms a neutral solution
  • What is the pH of a neutral solution?
    7
  • What happens to the products of neutralization?
    They have a pH of 7