Investigation (reaction of transition metal ions)

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Investigation (reaction of transition metal ions)

Aim- To find how hexaqua ions reacts with various substances (other ions)


  • Goggles
  • Apron
  • 5 test tubes
  • Beaker
  • Pipette
  • Hydrochloric acid
  • Copper hexaqua
  • Cobalt hexaqua
  • Chromium hexaqua
  • Ammonia
  • Sodium Hydroxide
  • sodium carbonate


  • We collected our five boiling tubes and set them up in the test tube rack
  • We collected the ion we were going to use (the cobalt) and measured about 5cm of it and poured it in each of the boiling tubes
  • We put a few drops of HCL in each of the boiling tubes containing the cobalt, we then had to swirl the solution and observe what was happening, then add a few more drops to excess it and see how it changes
  • We noted the results of what we observed in a table like the one below
  • We Repeated the same process with other chemical ions (chromium and copper)
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Risk assessment

Chromium hexaqua can be toxic, medium risks; can cause problems in the body such as breathing or lungs problems if inhaled too much. Hexaqua ions are quite acidic because of their pH, 3+ ions are more acidic than 2+ ions.

Exposure to cobalt hexaqua during long period of time can cause health risks such as damages to the lung

Hydrochloric acid is a very corrosive substance and therefore can seriously damage the eyes and skin. It can also cause problems to the respiratory tract by inflaming it. It can also cause severe burns to ...

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