I met Mr Lau (my Chemistry teacher in Secondary 1) on the last day of school and we had a very constructive discussion on my project.
He suggests me to keep my project simple since it is SIP and not RS. Taking that into consideration, I have modified my topic of investigation to be how the acidity of the environment affects leeching of pigments in flowers.
I plan to use one type of acid and one type of alkaline to create the pH range by diluting/concentrating the acid/alkaline. In this way, there will be one more constant variable and the leeching of pigments can then be soley attributed to the different pH conditions instead of a different liquid.
After the pigments have been leeched, I will use a colorimeter to measure the amount of light that can pass through the liquid. If the sensor detects a high amount of light, it means that less pigments have been leeched, but if it detects a lower amount of light, it indicates that there are more pigments in the liquid.
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