Investigation – Reaction of Transition Metal Ions Essay Sample

  • Pages: 4
  • Word count: 839
  • Rewriting Possibility: 99% (excellent)
  • Category: reaction

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Aim- To find how hexaqua ions reacts with various substances (other ions) Equipment * Goggles * Apron * 5 test tubes * Beaker * Pipette * Hydrochloric acid * Copper hexaqua * Cobalt hexaqua * Chromium hexaqua * Ammonia * Sodium Hydroxide * sodium carbonate Method- * 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

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)


Hexaqua ions




Sodium Hydroxide

Sodium carbonate

Cobalt (red)


Blue. Produced heat, and smoke

Went cloudy, produced a blue precipitate

Light blue cloudy and dark

Light pink

Precipitate, cloudy liquid

Copper (bleu)


Colour change to slightly green

Light blue

Slightly warm


Light blue, foamy state, and slightly warm

Light blue, foamy, produces a fizzy sound, goes a bit warm

Chromium (green)



Dark green, grey, not warm. Went into a solid state

Colour changes to Dark green

Dark green

Not warm

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 organs inside the body. Swallowing causes severe irritation and tissue destruction of the oesophagus and the digestive tract which may be fatal.

The sodium hydroxide is also corrosive which means it can burn the skin when in direct contact with it.

Swallowing copper haxaqua can cause harm; it can cause Irritation to the eyes and skin. It can also be very toxic to aquatic organisms, might cause long-term adverse effects in the aquatic environment.


According to my results, most of the ions reacted with the other chemicals (HCL, sodium Hydroxide, the sodium carbonate, the pH and the ammonia). We can see from my table the different colour changes the ions go through with every chemicals and we can also the texture some of them obtain. For example in the presence of ammonia, the chromium went from liquid to a solid state.


I am satisfied with the way the investigation went and the results I obtained from it. However there are some changes that I could make to it if I was to do it again. I was to repeat that investigation, I would make sure I measure out the right amount of ions and chemicals I need to carry out my investigation as the mount of chemical can make a difference to the outcome of the investigation.

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