Which molecule would you expect to be more soluble in water: CH3CH2CH2OH or HOCH2CH2CH2OH?

Video transcript

Welcome back everyone to another video. Which molecule would you expect to be more soluble in water? Ethanol or one comma three propane dial. And we are given for answer choices A states, ethanol B states A one comma three propane dial C states. Both of them have equal solubility and d neither of them dissolves in water. So first of all, let's understand that we are considering two alcohols, they both have that hydrocarbon chain within a wage group. So first of all, we can essentially state that if we expand it for the first molecule or ethanol, we have CG we C h2o H right? And the second one is also an alcohol which has 20 groups. So we have ohch two, we can essentially state that we have this three times, right? And after that, we can also state that we have another o age group. So now let's remember that alcohols, they are compounds that have carbon bonds to the wage group, right? We want to make sure that our carbon is saturated, meaning it has single bonds. So in general, whenever we have our wage, this is an alcohol, both of them are alcohols and I want to draw your attention that the wage group is actually of the greatest importance in this problem because those alcohol groups can actually form hydrogen bonds, right? This is really important. First of all, we want to consider the size of each molecule, the first molecule is smaller, we can see that the chain is shorter, right? So it's smaller, which is essentially important for solubility in water. We want to make sure that it's small. However, hygiene bonding is more important whenever we consider the solubility in water. Because if alcohols can form hydrogen bonds with water and the greater the number of bonds, we can form the the greater the solubility. Recall the rule like dissolve sl it means that polar compounds are soluble in polar solvents. And since water is polar, we want to identify which molecule is more polar. And the answer is the second one because it has a greater number of old age groups to a wage verses one. It's more polar, that's already sufficient for us to understand that it would be more soluble in water because water is also polar. However, in addition to that, those the age groups can form, can form more hydrogen bonds. And therefore, as a result, the second compound would be more soluble in water. We can essentially state that answer B is the correct option. One comma three propane dial is more soluble in water because it's more polar. It has a greater number of the alcohol groups. Thank you for watching.