Chemistry 5070 · O Level · Reversible reactions and equilibrium

Reversible reactions and equilibrium — practice question

Iron undergoes reaction with steam and with dilute sulfuric acid.
(a(i))[2]

Predict how the amount of hydrogen in the equilibrium mixture changes if the temperature is raised and the pressure stays constant. Explain your answer.

(a(ii))[2]

Predict how the amount of hydrogen in the equilibrium mixture changes if the pressure is raised and the temperature stays constant. Explain your answer.

(b(i))[2]

Construct the ionic equation, including state symbols, for the reaction between iron and dilute sulfuric acid.

(b(ii))[2]

Describe a chemical test that proves iron(II) sulfate has formed instead of iron(III) sulfate.

(b(iii))[1]

Calculate the relative formula mass of hydrated iron(II) sulfate, $\text{FeSO}_4\cdot7\text{H}_2\text{O$.

(b(iv))[1]

Calculate the mass of hydrated iron(II) sulfate crystals produced from 2.80 g of iron if the yield is 100%.

(c)[1]

Predict the products formed during the electrolysis of aqueous iron(II) sulfate using graphite electrodes.

(d)[3]

Describe the key reactions that take place in the extraction of iron in a blast furnace.

Worked solution & mark scheme

This 14-mark question has a full step-by-step worked solution and mark scheme. One marking point: The amount of hydrogen falls

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI