The lab that we conducted in class is based on three substances given to us in class and we has to identify what they were from a list of forty-eight substances using several experiments such as: solubility, pH, conductivity, boiling/melting point, ion test, flame tests, etc.
For the lab write up, I need to mention what the dependent, independent, and controlled variables are; but I am not sure what they would be and whether I need to mention different variables for each unknown substance or for each experiment conducted.
I was thinking that some controlled variables could be temperature and pressure of the room (STP conditions), or distilled water. However, I’m not sure what the dependent /independent variables could be. If further information is needed, such as the results, I can post them.
Thank you, in advance!