Collection over water. c) O2 NONPOLAR. Three of the compounds have a permanent dipole moment and should readily dissolve in water: SO3, NH3, and HCl. Which of the following is a correct balanced equation for a reaction of potassium with water to give potassium hydroxide and hydrogen gas? 1. In this single displacement reaction, what substance is the oxidizing agent? It is the best method of collecting a gas so long as the gas is insoluble or slightly soluble in water. Which of the following gases will become less soluble if the temperature of the water is raised? Collection by upward delivery. Yes, H2S is soluble in water slightly to form hydrosulphuric acid, which is a weak acid and not stable for it can be oxidated by the dissolved O2 to sulphur. a) CO2 NONPOLAR. The gas that is most soluble in water must have the largest amount charge on a specific position of the molecule. SF6 3. Hydogen gas, H2, does not have a permanent dipole moment, and thus is nonpolar and does not dissolve well in water which is polar. e) A network of electrostatic interactions exists between the molecules in water. d) The hydrophobic effect is driven largely by the entropy of the non-polar substance. Because hydrogen gas is a non-polar molecule, it does not readily form hydrogen bonds with water molecules, making it not very soluble in water. Consider dissolving gases in water. Which one of the following compounds will NOT be soluble in water? This method is used for gases which are soluble in water … 2K(s) + 2H2O(l) → H2(g) + 2KOH(aq) Which of the following ionic compounds is soluble in water? NH3 is polar, so the NH3 molecule has … However, H2 has a relatively high polarizability, which makes it weakly soluble - compared to other nonpolar solvents. This method can be used for insoluble gases which are more dense or less dense than air. hydrogen gas, H2. 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