Displacement

• What happens when an iron nail is placed in copper sulfate?

  The nail turns orange and copper sulfate changes color
• What is the chemical reaction when an iron nail is placed in copper sulfate?

  Iron plus copper sulfate goes to copper plus iron sulfate
• Why does the iron nail turn orange in copper sulfate?

  It gets covered in copper
• What is a displacement reaction?

  One metal replaces another in a compound
• What is required for a displacement reaction to occur?

  The metal must be more reactive than the other
• Will magnesium react with copper sulfate? Why?

  Yes, because magnesium is more reactive
• Will zinc react with calcium sulfate? Why?

  No, because zinc is less reactive than calcium
• What group do fluorine, chlorine, bromine, and iodine belong to?

  Group seven, the halogens
• How do halogens participate in displacement reactions?

  A more reactive halogen can displace a less reactive one
• What is oxidation in terms of electron transfer?

  Oxidation is the loss of electrons
• What is reduction in terms of electron transfer?

  Reduction is the gain of electrons
• What does the acronym "oil rig" stand for?

  Oxidation is loss, reduction is gain
• In a displacement reaction, what happens to the metals?

  One metal is oxidized and the other is reduced
• What are half equations used for?

  To show electron transfer in reactions
• Write the half equation for copper ions being reduced.

  Cu²⁺ + 2 electrons → Cu
• Write the half equation for iron being oxidized.

  Fe → Fe²⁺ + 2 electrons
• What is the significance of hydrogen and carbon in the reactivity series?

  They can behave like metals in reactions
• Why is carbon used in a blast furnace to displace iron?

  Carbon is more cost-effective than other metals
• What could be used instead of carbon to displace iron?

  More reactive metals like magnesium