Water was added to separate samples of anhydrous cobalt(II) chloride and anhydrous copper(II) sulfate. Which row shows the colour changes that occur in these reactions?
- Acobalt(II) chloride: blue to pink; copper(II) sulfate: blue to white
- Bcobalt(II) chloride: blue to pink; copper(II) sulfate: white to blue
- Ccobalt(II) chloride: pink to blue; copper(II) sulfate: blue to white
- Dcobalt(II) chloride: pink to blue; copper(II) sulfate: white to blue