H₂Se has a higher boiling point than H₂S. Based on intermolecular forces, the best explanation for this is: stronger dipole-dipole forces for H₂Se. stronger hydrogen-bond forces for H₂Se stronger dispersion forces for H2Se stronger dipole-dipole forces, larger dispersion forces, and larger hydrogen-bond forces for H:Se The solubility of a compound in water is 1.5 milligrams/liter. If we make up a solution that is 1.2 milligrams/liter, the solution is an unsaturated solution a saturated solution a supersaturated solution a concentrated solution
The Correct Answer and Explanation is :
The correct answer to the question about why H₂Se has a higher boiling point than H₂S is: stronger dispersion forces for H₂Se.
Here’s the explanation:
The boiling point of a compound is determined by the strength of its intermolecular forces. These forces include hydrogen bonding, dipole-dipole interactions, and dispersion forces. The key to understanding why H₂Se has a higher boiling point than H₂S lies in the comparison of their molecular structures and the types of intermolecular forces they experience.
Both H₂Se and H₂S have similar molecular structures, where the central atom (Se or S) is bonded to two hydrogen atoms. Both molecules are polar, meaning they experience dipole-dipole interactions. However, the main difference between H₂Se and H₂S is the atomic size and mass of selenium (Se) compared to sulfur (S). Selenium is a larger atom and is further down in the periodic table, which means it has more electrons than sulfur. This larger electron cloud results in stronger dispersion forces (also known as London dispersion forces) in H₂Se than in H₂S.
Dispersion forces are temporary, induced dipole interactions that occur in all molecules, but they are particularly significant in larger atoms and molecules due to their more polarizable electron clouds. Therefore, the larger size of selenium in H₂Se contributes to stronger dispersion forces, which in turn leads to a higher boiling point compared to H₂S.
Now, let’s discuss the solubility question:
If the solubility of a compound is 1.5 milligrams/liter, and you prepare a solution that contains 1.2 milligrams/liter of the compound, the solution is an unsaturated solution.
An unsaturated solution is one where the amount of solute dissolved is less than the maximum solubility of that solute in the solvent at a given temperature. In this case, the solution has 1.2 milligrams/liter of solute, which is less than the 1.5 milligrams/liter maximum solubility. Since the solute has not reached its maximum capacity to dissolve, the solution is considered unsaturated.
To summarize:
- H₂Se has a higher boiling point than H₂S because of stronger dispersion forces due to the larger size of the selenium atom.
- The solution with 1.2 milligrams/liter of solute is an unsaturated solution because it contains less solute than the maximum solubility of 1.5 milligrams/liter.