If this is the predominant factor, then the compound may be highly soluble in water. 7 years ago. Solubility depends on the relative stability of the solid and solvated states for a particular compound. And I'm actually one of the people who's doing the best. So what I want you guys to do is think about the polarity of water, think about is it polar or is it apolar and then look for dipoles on these six molecules. How in the world can you predict that? Hydrogen bonds are very strong dipole interactions that occur in molecules where hydrogen is bonded to very highly electronegative atoms such as fluorine, nitrogen, oxygen or chlorine. Solubility of a solute can be determined by comparing the polarities of the solute and the solvent molecules. For instance, if it has very strong interactions between molecules or ions in the solid state, then it won't be very soluble unless the solvation interations are also very strong. Drinking alcohol (ethanol) contains a short 2-carbon atom backbone, and therefore dissolves in water at any ratio. Learn about ionic compounds. Festival of Sacrifice: The Past and Present of the Islamic Holiday of Eid al-Adha. The greater the difference in electronegativities between atoms in a molecule (i.e., Cl and C, O and C, and so on), the more polar the molecule is, and the more water-soluble. Hydrogen bonds are the strongest of all three intermolecular forces. Fact Check: What Power Does the President Really Have Over State Governors? Will 5G Impact Our Cell Phone Plans (or Our Health?! When a polar solute is added to the solvent, the solute is able to disrupt the interactions and disperse itself among the solvent molecules. Two forces determine the extent to which the solution will occur: Force of Attraction Between H2O Molecules and the Ions of the Solid This force tends to bring ions into solution. Covalent molecules have three types of intermolecular forces: van der Waals, dipole-dipole interactions and hydrogen bonding. Meaning if the solute is a polar compound (in general, not intramolecular forces), then it will dissolve. The second question, CH3CH2OH has a polar covalent bond (C-O) and is also capable of forming hydrogen bonds with water. This page discusses the solubility of compounds in water at room temperature and standard pressure. If it's not, then it will not dissolve. Secondly, there is an equation, Kc = e^-dG/RT. I'm a little confused on how to determine a compound is soluble in water with only the compound's chemical formula. Hope this helps :) Anonymous. Informations sur votre appareil et sur votre connexion Internet, y compris votre adresse IP, Navigation et recherche lors de l’utilisation des sites Web et applications Verizon Media. 2 Answers. Pressure and temperature affect solubility. A non-polar solvent can dissolve nonpolar solutes because both the solvent and the solute have weak van der Waals forces. In these cases, the partial positive charge of a solvent molecule attracts the partial negative charge of a solute molecule. You need to look up solubility rules: 1) All nitrates are soluble . Polar solvents will dissolve polar solutes and nonpolar solvents will dissolve non-polar solutes due to the presence of similar intermolecular forces. First, whether the compound is polar or non polar. Relevance. You can determine the general polarity by identifying its molecular shape. All ionic compounds are polar, so in theory all dissolve, but you must consider number 2. Vous pouvez modifier vos choix à tout moment dans vos paramètres de vie privée. The result is an ion, which has an electric charge. Molar mass, and structures of the molecules are more facts which can decide dissolving. I sit in the front of class, and I can't understand anything! The more interactions a molecule can form with water, the more soluble it is, therefore the compound that can hydrogen bond will dissolve better. Polar solvents will dissolve polar solutes and nonpolar solvents will dissolve non-polar solutes due to the presence of similar intermolecular forces. The opposite is a dilute solution; this solution can accept more solute. Pour autoriser Verizon Media et nos partenaires à traiter vos données personnelles, sélectionnez 'J'accepte' ou 'Gérer les paramètres' pour obtenir plus d’informations et pour gérer vos choix.