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. As with most systems, this one will try to minimize its total energy. 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). Shouldn't it be that different molecules attract to eachother. 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? And here when we say "polar" we mean "charge-separated". This means that polar molecules will dissolve polar molecules, and non-polar molecules will dissolve with non-polar molecules. The types of intermolecular forces dictate these results. It is most often used when discussing polar and nonpolar solvents. Why does like dissolves like? Why does this rule exist and how does it work? Once you know what makes two (or more) substances “likes”, the answer is self-evident. This view is … For example, why doesn't a polar molecule dissolve a non-polar molecule. What are the principles behind it? If the Gibbs free energy change of a process is negative then the process is likely to happen. Polar substances tend to dissolve in polar solvents, and nonpolar substances dissolve in nonpolar solvents. The rule states that polar solutes will dissolve in polar solvents and non-polar solutes will dissolve in non-polar solvents. 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". 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. Thanks! 'Like dissolves like' is a good rule of thumb, but should be approached with care. 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. These examples illustrate what is meant by the comment "like dissolves like". This is a bit like the old slogan “Safety is no accident”. > Why is this so? like dissolves like. How about the other two products? This statement indicates that a solute will dissolve best in a solvent that has a similar chemical structure to itself. Chemists say that ‘like dissolves like,’ meaning that substances with similar chemical characteristics will dissolve in each other. 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. Why do each of them form homogeneous solutions? This means that substances are more likely to dissolve in other substances with similar chemical properties. share. Question 7 Based on the "like dissolves like" principle, please explain why the product you identified as not homogeneous has two different layers. Question 8 See the information in Question 6 of the Makeup Remover pdf file opened in the first step of this assignment. The usual and simplistic divide is to categorize materials as polar or non-polar. For example it says polar molecules will dissolve polar molecules and non-polar molecules will dissolve non-polar molecules? 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