Acids and Alkalis

Cards (38)

  • What does the pH scale measure?
    The acidity or alkalinity of a solution
  • How can the pH of a solution be measured?
    Using a pH probe or universal indicator
  • What pH value indicates a neutral solution?
    7
  • What happens to an indicator when an acid is added?
    It changes color
  • What is the pH of a strong acid?
    Less than 7
  • What is the pH of a strong alkali?
    Greater than 7
  • What is produced in a neutralization reaction?
    Salt and water
  • What is the general word equation for neutralization reactions?
    • Acid + AlkaliSalt + Water
  • What is the product of hydrochloric acid and sodium hydroxide?
    Sodium chloride and water
  • What is produced when sulfuric acid reacts with calcium carbonate?
    Calcium sulfate, water, and carbon dioxide
  • What is the test for carbon dioxide?
    It turns limewater cloudy
  • What color does litmus turn in acids?
    Red
  • What color does litmus turn in alkalis?
    Blue
  • What is the pH of stomach acid?
    1
  • What is the purpose of neutralization in gardening?
    To ensure soil has the correct pH
  • How does neutralization help with insect stings?
    It neutralizes excess acid from the sting
  • How does neutralization help with indigestion?
    It neutralizes excess acid in the stomach
  • What is the general equation for acid and metal carbonate reactions?
    Acid + Metal Carbonate → Salt + Water + Carbon dioxide
  • What is observed when an acid reacts with a metal carbonate?
    Fizzing due to carbon dioxide production
  • What is the color change of red cabbage indicator in acid?
    Red
  • What is the color change of red cabbage indicator in alkali?
    Blue
  • What is the meaning of the old hazard symbol for corrosive substances?
    Attacks and destroys living tissues
  • What does the new hazard symbol for flammable substances indicate?
    Catches fire easily
  • What does the hazard symbol for biohazard indicate?
    Biological substances that threaten health
  • What does the hazard symbol for toxic substances indicate?
    Can cause death if swallowed or inhaled
  • What is the significance of hazard warning labels?
    To indicate chemical hazards in substances
  • What is the role of indicators in measuring pH?
    They change color in acids or alkalis
  • Why is the type of salt produced in a neutralization reaction important?
    It depends on the acid and alkali used
  • How does the pH scale relate to everyday substances?
    It indicates acidity or alkalinity of substances
  • What is the pH of stomach acid?
    pH 1
  • Why is tomato juice considered a weak acid?
    It has a pH of 4
  • What is the pH of baking soda?
    pH 9
  • What does a pH of 12 indicate about bleach?
    It is a strong alkali
  • What is neutralization and its importance?
    • Alkalis cancel out acids, making them neutral
    • Important in gardening and agriculture for soil pH
    • Helps with insect stings and bites
    • Controls indigestion from excess stomach acid
    • Maintains correct pH in foods like jam
  • What is the general equation for neutralization?
    acid + alkalisalt + water
  • What type of salt does hydrochloric acid produce?
    Chloride salts
  • What type of salt does sulfuric acid produce?
    Sulfate salts
  • What type of salt does nitric acid produce?
    Nitrate salts