Ethical<span> concerns </span>affect scientific research<span> when </span>scientists<span> or groups of </span>scientists<span> let their personal bias or political persuasions </span>affect<span> the </span>research<span> being conducted. </span>Scientific ethics<span> involve doing experimentation and analysis of data without bias no matter what the conclusions point to.</span>
Caffeine is more soluble in dichloromethane and the both are separated by evaporating the solvent.
Caffeine is an organic plant material which is more soluble in non-polar solvents than in polar solvents. As such, caffeine is more soluble in dichloromethane than in pure water.
In order to carry out a liquid-liquid exaction of dichloromethane from a commercial teabag, the dichloromethane is mixed with water. The caffeine is found to be more soluble in the organic dichloromethane layer than in water.
The two solvents can now be separated using a separating funnel and the solution is evaporated to obtain the caffeine.
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