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Questions 4.4.4

  1. Draw a diagram of the set-up you would use to combine (react) dry chlorine gas with iron metal to form iron (III) chloride.

  2. Why should the gas be dry?

  3. How can the gas be dried?

  4. Write a chemical equation for direct combination of iron and chlorine gas.

  5. Why is strong heating necessary?

  6. How is chlorine gas produced?



Answers to Questions 4.4.4

  2. To remove water because steam would also react with iron.
  3. By bubbling or passing it through concentrated sulphuric acid or anhydrous calcium chloride.

  4. 2Fe(s)   +   3Cl2(g)   ⟶   2 FeCl3(s)

  5. Large amount of energy is required to start the reaction.
  6. By reacting concentrated hydrochloric acid with manganese (IV) oxide or potassium manganate (VII).