Which compound in each of the following pairs would be more soluble in water? Explain.
b. propanone or 3-hexanone

Question

Which compound in each of the following pairs would be more soluble in water? Explain.

b. propanone or 3-hexanone

Accepted Answer

Hi, everyone. Welcome back. Our next question says, which substance proal or Pinel is more soluble in water? Why a Pinel is more soluble in water than propel? Because it has a stronger intermolecular force, the propel is more soluble because it has a stronger intermolecular force. C Pinel is more soluble than water in water than propel because it has a smaller nonpolar region or d pronel is more soluble in water because it has a smaller nonpolar region. So to think about this, we need to look at the structures of fentaNYL and propel and compare them. So propel, we have the root of propane which is a three carbon molecule. So three carbons and our ale ending means that it has an aldehyde. So let's draw a skeletal structure. So I have 123 carbons and the third carbon has a double bond to an oxygen. So the third carbon is a carbon group, it's an aldehyde. So that's the end of it. There's just a hydrogen on the other side of that carbon, then Pantanal, similar aldehyde, but it has five carbons. So let's draw that 12345 and then the double bond to the oxygen at the end. So let's think about what would affect their solubility. Well, remember that like dissolves like and when we think about dissolving in water, we recall that water is quite a polar molecule and in fact, is capable of hydrogen bonding. So polar substances will dissolve in water with substances capable of hydrogen bonding being the most happy dissolved in water. So let's look at our two molecules. Well, they both have the same intermolecular forces or the same types of intermolecular forces, both have are capable of dipole dipole interactions. And in red, I'm going to mark because of this carbon bond, they both have a dipole moment because oxygen is more electron than carbon. So I've drawn that arrow pointing towards the oxygen away from the carbon with the little plus little hash mark across the bottom of the arrow. It looks like a plus mark. And then the same thing for Pentel, it's got that same carbonel bond. So it has a dipole moment of electrons being more attracted to the oxygen than the carbon in the carbon bond. And then they both have a non polar region that ch chain, that hydrocarbon chain. So I've circled the non polar region and labeled it nonpolar and that region won't dissolve well in water because it's non polar, all it has is London dispersion forces. So there'll be a very, very slight chance of attraction based on those. But in general, it won't dissolve well in water. So when we look at choice A and B, which say that one is stronger than the other because of a stronger intel molecular force. Both of those would be incorrect because our two compounds have the same types of intermolecular force. So let's look at choice CND where the difference is a smaller non polar region. Well, which of these has a smaller nonpolar region that would be propanol with only three carbons total and two in that non polar region. So choice D prop is going to be our answer. Pinel choice C will not again because that has five carbons versus three carbons in the pronel. And you can even see looking at the region. I've circled that non polar region in Pinal, much larger. So propanol where the polar region, that carbel group is much larger in relation to the nonpolar region will be more soluble in water. So our answer to which substance is more soluble choice D pronel is more soluble in water than Pinel because it has a smaller nonpolar region. See you in the next video.

Which compound in each of the following pairs would be more soluble in water? Explain.
b. propanone or 3-hexanone

Verified video answer for a similar problem:

Key Concepts

Polarity

Functional Groups

Hydrogen Bonding

Which compound in each of the following pairs would be more soluble in water? Explain.b. propanone or 3-hexanone

Verified video answer for a similar problem:

Key Concepts

Polarity

Functional Groups

Hydrogen Bonding

Which compound in each of the following pairs would be more soluble in water? Explain.
b. propanone or 3-hexanone