Displacement reactions

    Cards (22)

    • Metal displacement reactions involve replacing less reactive metal atoms with more reactive ones, forming new compounds.
    • What are displacement reactions used for in chemistry?
      To compare the reactivity of metals
    • What type of reactions are displacement reactions classified as?
      Redox reactions
    • How can oxidation and reduction be described in electrochemistry?
      Oxidation is the loss of electrons, and reduction is the gain of electrons
    • Why are displacement reactions considered redox reactions?
      Because oxidation and reduction occur simultaneously
    • What happens to the more reactive metal in a displacement reaction?
      The more reactive metal is oxidized
    • What happens to the less reactive metal in a displacement reaction?
      The less reactive metal is reduced
    • What is the result of the reaction between calcium and zinc oxide?
      Calcium is oxidized to form calcium oxide and zinc is produced
    • What occurs when a reactive metal is placed in a solution of a less reactive metal salt?
      The reactive metal displaces the less reactive metal
    • What happens when a less reactive metal is placed in a solution of a more reactive metal salt?
      No reaction occurs
    • How can displacement reactions be used to determine the order of reactivity of metals?
      By observing which metals displace others in reactions
    • What is a metal ore?
      • A rock containing enough metal to make extraction economically worthwhile
      • Often an oxide of the metal
      • Example: Bauxite is aluminium oxide (Al₂O₃)
    • What are some examples of unreactive metals found as uncombined elements?
      Gold and platinum
    • How can a metal be extracted from its ore using carbon?
      By reduction, where oxygen is removed from the ore
    • What is the chemical equation for the reduction of iron oxide using carbon?
      2Fe2O3+2Fe₂O₃ +3C4Fe+ 3C \rightarrow 4Fe +3CO2 3CO₂
    • What determines whether a metal can be extracted by reduction with carbon?
      The position of the metal in the reactivity series
    • What is the reactivity series of metals?
      • Potassium (K)
      • Sodium (Na)
      • Calcium (Ca)
      • Magnesium (Mg)
      • Aluminium (Al)
      • Carbon (C)
      • Zinc (Zn)
      • Iron (Fe)
      • Tin (Sn)
      • Copper (Cu)
      • Silver (Ag)
      • Gold (Au)
    • What is the process of electrolysis used for in metal extraction?
      To extract metals that are more reactive than carbon
    • What happens during electrolysis of molten compounds?
      An electric current is passed through the molten ore
    • What is produced at the cathode during electrolysis?
      The metal is discharged
    • What is produced at the anode during electrolysis?
      The non-metal is discharged
    • What are the advantages and disadvantages of using electrolysis for metal extraction?
      Advantages:
      • Effective for extracting highly reactive metals
      • Produces pure metals

      Disadvantages:
      • Expensive process
      • Requires significant energy input
    See similar decks