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Investigation (reaction of transition metal ions)

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Introduction

Investigation (reaction of transition metal ions) 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 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 ...read more.

Middle

Ph1 Colour change to slightly green Light blue Slightly warm Cloudy Light blue, foamy state, and slightly warm Light blue, foamy, produces a fizzy sound, goes a bit warm Chromium (green) Ph1 Greyish 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. ...read more.

Conclusion

Conclusion 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. Evaluation 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. ...read more.

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