YT VIDEO

• What metals are demonstrated in the reactivity experiment?

  Lithium, sodium, and potassium
• What is the purpose of the phenolphthalein indicator in the experiment?

  To show a change in pH during reactions
• What happens when lithium metal is placed in water?

  It bubbles, fizzes, and turns the water pink
• What does the pink color indicate in the lithium reaction?

  A change in pH due to the reaction
• How does sodium metal react when placed in water compared to lithium?

  Sodium reacts vigorously and catches fire
• What is a notable characteristic of the sodium reaction with water?

  It emits hydrogen that catches on fire
• What are the observable effects of lithium and sodium when they react with water?

  • Lithium: Bubbles, fizzing, water turns pink
  • Sodium: Vigorous reaction, emits hydrogen, catches fire
• What is the visual indicator of a reaction occurring in the experiment?

  Bubbling and fizzing of the metals
• What does the bubbling and fizzing indicate during the reactions?

  Gas is being released from the reaction
• How does the reactivity of lithium compare to sodium and potassium?

  Lithium reacts less vigorously than sodium
• What happens to the water when lithium is added?

  It begins to turn pink
• Why does sodium metal melt during its reaction with water?

  Due to the heat generated from the reaction
• What safety concern arises from the sodium reaction with water?

  Hydrogen gas catching fire
• What can be inferred about potassium's reactivity compared to lithium and sodium?

  Potassium is expected to be more reactive