Polar compounds dissolve in polar compounds and nonpolar dissolve in nonpolar. Hexane has a six carbon chain and is nonpolar. Polar substances tend to dissolve in polar solvents, and nonpolar substances dissolve in nonpolar solvents. This means that substances are more likely to dissolve in other substances with similar chemical properties. Question 8 See the information in Question 6 of the Makeup Remover pdf file opened in the first step of this assignment. Why does this rule exist and how does it work? The rule states that polar solutes will dissolve in polar solvents and non-polar solutes will dissolve in non-polar solvents. What are the principles behind it? This statement indicates that a solute will dissolve best in a solvent that has a similar chemical structure to itself. Like Dissolves Like When it comes to explaining or determining solubility of solvents, we use a helpful phrase that goes like this: Like dissolves Like. A popular aphorism used for predicting solubility is "like dissolves like" also expressed in the Latin language as "Similia similibus solventur". when passing a non-polar aqueous solution through a filter of the highly non-polar silica c-18 hydrocarbon, why will it favor the association with the silica? Also, how do non-polar molecules dissolve non-polar molecules? This means that polar molecules will dissolve polar molecules, and non-polar molecules will dissolve with non-polar molecules. Question 7 Based on the "like dissolves like" principle, please explain why the product you identified as not homogeneous has two different layers. like dissolves like. How about the other two products? I was wondering why is it that like solvents dissolve like solutes? For example, why doesn't a polar molecule dissolve a non-polar molecule. Can Someone Explain Why the "Like Dissolves Like" Chemistry Solubility Rule Works Like I Am 5. Polar solvents dissolve polar solutes....of course there is a catch... Polar solvents TEND to dissolve polar solutes....and non-polar solvents TEND to dissolve non-polar solutes...but this is a VERY general rule of thumb. If the Gibbs free energy change of a process is negative then the process is likely to happen. For something to dissolve it must not only lose the bonds it has between its own particles, but it must also break the bonds the solvent has between solvent particles. Shouldn't it be that different molecules attract to eachother. These examples illustrate what is meant by the comment "like dissolves like". basically, what is the chemical principle behind the theory of "Like dissolves Like" this is in regards to a Liquid Chromatography experiment with grape koolaid and the aforementioned silica c-18 hydrocarbon. Why do each of them form homogeneous solutions? share. 2 comments. The quick answer is that “Like dissolves like”. The usual and simplistic divide is to categorize materials as polar or non-polar. Thanks! This is a bit like the old slogan “Safety is no accident”. It is most often used when discussing polar and nonpolar solvents. Chemists say that ‘like dissolves like,’ meaning that substances with similar chemical characteristics will dissolve in each other. As with most systems, this one will try to minimize its total energy. > Why is this so? The types of intermolecular forces dictate these results. 'Like dissolves like' is a good rule of thumb, but should be approached with care. For example it says polar molecules will dissolve polar molecules and non-polar molecules will dissolve non-polar molecules? When a solute dissolves in a solvent the individual particles of the solute separate from their neighbours and move between the spaces of the solvent particles. And here when we say "polar" we mean "charge-separated". Why does like dissolves like? Specifically, polar solvents tend to dissolve polar solutes, and non-polar solvents tend to dissolve non-polar solutes, while non-polar and polar substances are Immiscible (do not mix). Once you know what makes two (or more) substances “likes”, the answer is self-evident. This view is … Well, this is where chemistry gets a little tricky, becomes a 'case by case' study, and starts having more exceptions to a rule than anything else.