Which compound in each pair would be more soluble in water? Explain.
b. 2-propanol or 2-pentanol

Question

Which compound in each pair would be more soluble in water? Explain.

b. 2-propanol or 2-pentanol

Accepted Answer

All right. Hi, everyone. So this question says, would the compound to butanol be more soluble in water than the compound to heany? Explain here we have four different answer. Choices labeled A through D. Now options A and B proposed that two butanol would be more soluble because of the hydrocarbon chain being longer or shorter than that of two hex. And all option C says that two Hexon all would be more soluble because of hydrogen bonding. And option D says, no, they are equally soluble. So let's go ahead and get started. The main thing to keep in mind when answering this question is the principle of like dissolves, like in other words, molecules of the same polarity will dissolve in each other. So in the context of this question specifically, let's recall the structure of water 4 h2o in the case of water, we have two bonds between one oxygen atom and two hydrogen atoms. These bonds make water a polar molecule overall because there's a difference in electronegativity between oxygen and hydrogen. So when understanding this question, another thing worth recalling here are your intermolecular forces or I MS for short IMF s are forces at play that make molecules gravitate towards each other when they're in close enough proximity. Now, the primary IMF of water is hydrogen bonding or h bonding for short h bonding is the second strongest IMF and it occurs in compounds where hydrogen is directly connecting to an electron element, namely nitrogen, oxygen or fluorine. So the main point to remember here is that molecules with IMF s similar to those of water are going to be more soluble in water. So with this in mind, let's go ahead and talk about the structures of two butanol and two hexagon. The suffix in both of them indicates that both molecules are alcohols. Now, in the case of two butanol, we have a four carbon chain with the hydroxy or oh group on carbon too to Hexon. All on the other hand is a six carbon chain with the hydroxy group on carbon two as well. So here we have two button all on the left and two hex and all on the right. So the first thing that is worth mentioning here is that both compounds have hydrogen atoms attached to the highly electron atom of oxygen. So in other words, both of these molecules are capable of h bonding with water to a certain extent. Now when I said earlier that they each bond with water to a certain extent, this is because we have to consider the fact that alcohols are organic molecules with hydrocarbon chains, hydrocarbon chains if you recall are nonpolar. And so with this in mind, we can differentiate between two different regions. So to speak, the hydroxy group is described as the more polar region, where is the hydrocarbon chain is considered to be the more nonpolar region. So the larger the nonpolar region happens to be, the more differences there are between the alcohol in question and water itself meaning that the alcohol becomes less soluble in water. So in this case, we have a four carbon chain versus a six carbon chain, the six carbon chain of two hex and all is larger and therefore the non polar region of two hexen is larger than that of two butanol. So this means that two Hexon all is going to be less soluble then too but not. And therefore our answer here is going to be option B in the multiple choice. Yes, two butanol would be more soluble in water than two hexen all because the former has a shorter nonpolar hydrocarbon chain than the latter. And so with that being said, thank you so very much for watching. And I hope you found this helpful.

Which compound in each pair would be more soluble in water? Explain.
b. 2-propanol or 2-pentanol

Verified video answer for a similar problem:

Key Concepts

Polarity

Hydrogen Bonding

Chain Length and Solubility

Which compound in each pair would be more soluble in water? Explain.b. 2-propanol or 2-pentanol

Verified video answer for a similar problem:

Key Concepts

Polarity

Hydrogen Bonding

Chain Length and Solubility

Which compound in each pair would be more soluble in water? Explain.
b. 2-propanol or 2-pentanol