Chemistry 0620 · IGCSE · Physical and chemical changes

Physical and chemical changes — practice question

In which reaction does the colour change from blue to white?

  • Aheating hydrated cobalt(II) chloride
  • Bheating hydrated copper(II) sulfate
  • Cadding water to anhydrous cobalt(II) chloride
  • Dadding water to anhydrous copper(II) sulfate

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

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