Chemistry chemical changes

• What is the order of the reactivity series for the listed metals?

  Potassium, Sodium, Lithium, Calcium, Magnesium, Zinc, Iron, Copper
• What do potassium, sodium, lithium, and calcium produce when they react with water?

  An alkaline solution and hydrogen gas
• What do potassium, sodium, lithium, calcium, magnesium, zinc, and iron produce when they react with dilute acids?

  A salt and hydrogen gas
• How can you deduce the order of reactivity of metals?

  Based on experimental results
• What happens when a metal displaces a less reactive metal from a compound?

  The less reactive metal is replaced
• What is the general equation for the reaction of metals with oxygen?

  Metal + Oxygen → Metal Oxide
• What does oxidation mean in terms of oxygen?

  A substance gaining oxygen
• What does reduction mean in terms of oxygen?

  A substance losing oxygen
• Why are some metals like gold and silver found in their native state?

  They are very unreactive
• How are most metals found in the Earth?

  As compounds requiring chemical reactions
• What are ores?

  Rocks containing enough metal compounds
• How can a metal be extracted from its oxide if it is less reactive than carbon?

  By reduction using carbon
• How are metals more reactive than carbon extracted?

  By electrolysis
• What does oxidation mean in terms of electrons?

  Losing electrons (OIL)
• What does reduction mean in terms of electrons?

  Gaining electrons (RIG)
• Write the ionic equation for the displacement reaction of copper ions.

  Cu²⁺ + 2e^- → Cu
• In a redox reaction, how can you identify which species are oxidized and which are reduced?

  By analyzing the symbol equation or half equation