Chemistry 5070 · O Level · Physical and chemical changes

Physical and chemical changes — practice question

On heating, crystals of copper(II) sulfate, $\text{CuSO}_4\cdot5\text{H}_2\text{O}$, undergo the reaction shown below. $\text{CuSO}_4\cdot5\text{H}_2\text{O}(s) \rightarrow \text{CuSO}_4(s) + 5\text{H}_2\text{O}(g)$ If .....1..... copper(II) sulfate, which has a .....2..... colour, is heated, it produces .....3..... copper(II) sulfate, which has a .....4..... colour. Which words should be used to fill gaps 1, 2, 3 and 4?

  • Aanhydrous; blue and crystalline; hydrated; white and powdery
  • Bhydrated; colourless and crystalline; anhydrous; blue and powdery
  • Chydrated; blue and powdery; anhydrous; colourless and crystalline
  • Dhydrated; blue and crystalline; anhydrous; white and powdery

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