Intermolecular Forces and Solubility Quiz

Polar liquids do not mix with nonpolar liquids due to differences in attractions. Polar molecules are attracted to each other through dipole-dipole interactions, while nonpolar molecules are attracted through dispersion forces. These different attractions lead to immiscibility.

The particle diagram should show magnesium ions (Mg^2+) and bromide ions (Br^-) surrounded by water molecules with partial charges and attractions indicated. MgBr2(aq) conducts electricity because it dissociates into ions in water, allowing for the flow of charge.

The particle diagram should show CHOH molecules with partial charges and attractions indicated. CHOH (aq) does not conduct electricity because it does not dissociate into ions in water. No free ions are available for charge conduction.

<p>Solid MgSO4 does not conduct electricity because its ions are not free to move and carry charge. In contrast, molten MgSO4 allows the ions to move freely, facilitating charge conduction.</p> Signup and view all the answers

<p>a) The carbon atoms in graphite have sp2 hybridization. Graphite has a layered structure where carbon atoms are arranged in hexagonal rings. b) Graphite has a high melting point and requires a lot of energy to reach it due to the strong covalent bonds within the layers. c) Graphite is slippery and acts as a good lubricant due to the weak forces between the layers, allowing them to slide over each other easily. d) Graphite conducts electricity due to the delocalized electrons within the layers.</p> Signup and view all the answers

<p>a) Water has a relatively high boiling point due to hydrogen bonding, which requires a significant amount of energy to break. This property is important for the regulation of temperature in living organisms, as water can absorb heat without a large increase in temperature. It also plays a crucial role in climate regulation and nutrient cycling. b) Ice is less dense than liquid water because of the open hexagonal structure of ice crystals. This property is important for aquatic ecosystems, as it allows ice to float and insulate the water below, providing a habitat for organisms during winter. It also prevents rapid cooling of lakes and oceans. c) Water dissolves a large variety of substances due to its polar nature, making it the 'universal' solvent. This property is important for life as it facilitates biochemical reactions and nutrient transport. It also plays a key role in environmental processes such as weathering and erosion, and it is crucial for scientists in various experimental and analytical procedures.</p> Signup and view all the answers