So In my biology class. We just had a lab. We were suppose to test for organic molecules, such as; protein, vitamin C, reduced sugars, etc in certain substances. During our lab we used iodine and control groups like thoes. But i was wondering why we add water to our lab, when testing.
Add the substance and 10 mL of water and then the control group....
Please help. Its for a lab discussion. And I'm not quite sure, Why we add water, to our experiment.
When we test for certain substances, why must we use water?
because water is a polar solvant, as is the cytosol in your cells. it is also a convenient solvant to use, which dissolve almost all of the biomacro compounds, and in addition, immediately cause bulk phase separation in those that done.
Reply:sorry to say but your question wasnt clear enough but ill try to answer it.
it depends on what you are testing but most of the time you have to add a solvent to a soulute of anything and we consider water as a universal solvent because 1st its acidity/basicity is at 7 which is neutral because it contributes 1 H+ and 1 OH- to a solution so it doesnt change the behavior of particles in solute so most of the time, this solvent is chosen. and the reason of adding water to different solute, example starch is to increase the surface area where different testing chemicals can act to give an accurate result.
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