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Question about Structure of Ionic Solids

Subject Chemistry

Chemistry

Source Originais Teachy

Originais Teachy

Topic Structure of Ionic Solids

Structure of Ionic Solids

Difficulty Medium

Medium

(Originais Teachy 2023) - Question Medium of Chemistry

Ionic solids, unlike molecules, do not consist of a fixed number of ions. Instead, they have a repeating pattern of ions, forming a crystal lattice. Imagine that you are a scientist working on a new type of ionic solid. Based on your knowledge of the structure of ionic solids, what would you expect about the properties of this new ionic solid if it has a larger ratio of cations to anions compared to sodium chloride (NaCl)?

The new ionic solid would have lower melting and boiling points due to the larger ratio of cations to anions.

The new ionic solid would have higher solubility in water because the larger number of cations would weaken the ionic bonds.

The properties of this new ionic solid would be influenced by this larger ratio of cations to anions. Here are some expectations: - Higher melting and boiling points: More cations mean stronger electrostatic forces in the crystal lattice, which would require more energy to break. Therefore, we can expect the new ionic solid to have higher melting and boiling points compared to NaCl. - Greater hardness: A larger number of cations would also result in a more tightly packed crystal lattice, leading to greater hardness. - Lower solubility in water: Ionic solids dissolve in water when the attraction between the water molecules and the ions in the solid overcome the ionic bonds in the solid. A larger number of cations would strengthen the ionic bonds, making it harder for water molecules to break them and dissolve the solid.

The properties of the new ionic solid would not be influenced by the larger ratio of cations to anions.

The new ionic solid would be softer due to the larger number of cations in the crystal lattice.

Answer sheet:

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