2. Which of the properties listed here are characteristic of an ionic bond?
i. low melting point
ii. good electricity conductor as a solid
iii. dissolves in water to form a solution that contains mostly ions
iv. dissolves to form a solution that contains mostly molecules
v. good electricity conductor when melted
vi. forms solid crystals
The Options are:
a. i,iii,iv
b. ii,v,vi
c. iii,v,vi
d. ii,iii,v
e. i,iii,vi
The correct answer is: c. iii, v, vi
are these correct?
Apologies for the confusion. The correct answer should be: c. iii, v, vi.
Let me explain the properties characteristic of an ionic bond:
iii. An ionic bond involves the transfer of electrons between atoms, resulting in the formation of ions. When an ionic compound dissolves in water, it dissociates into ions, forming a solution that contains mostly ions.
v. Ionic compounds are typically good electricity conductors when melted or dissolved in water. In the molten or aqueous state, the ions are free to move and carry an electric charge.
vi. Ionic compounds tend to form solid crystals with a distinct regular lattice structure. The strong electrostatic attraction between the positively and negatively charged ions holds the crystal structure together.
The characteristics of an ionic bond are:
i. low melting point - This is not characteristic of an ionic bond. Ionic compounds generally have high melting points due to strong electrostatic attractions between oppositely charged ions.
ii. good electricity conductor as a solid - This is not characteristic of an ionic bond. Ionic compounds do not conduct electricity as solids because the ions are locked into a fixed lattice and cannot move freely to conduct the electric current.
iii. dissolves in water to form a solution that contains mostly ions - This is a characteristic of an ionic bond. Ionic compounds dissociate into ions when dissolved in water, forming a solution that contains mostly ions.
iv. dissolves to form a solution that contains mostly molecules - This is not characteristic of an ionic bond. Ionic compounds do not dissolve in water to form molecules. They dissociate into ions.
v. good electricity conductor when melted - This is characteristic of an ionic bond. Ionic compounds can conduct electricity when melted because the ions are free to move and carry the electric current.
vi. forms solid crystals - This is characteristic of an ionic bond. Ionic compounds form orderly crystal lattice structures due to the strong electrostatic attraction between the ions.
Based on these characteristics, the correct answer is:
c. iii,v,vi
To determine which of the properties listed are characteristic of an ionic bond, we need to understand what an ionic bond is and how it behaves.
An ionic bond forms between a metal and a non-metal when there is a transfer of electrons. In an ionic bond, the metal donates electrons to the non-metal, resulting in the formation of positive and negative ions that are attracted to each other.
Now let's take a look at each of the properties listed:
i. low melting point - This property is not characteristic of an ionic bond. Ionic compounds usually have high melting points due to the strong electrostatic forces of attraction between the positive and negative ions.
ii. good electricity conductor as a solid - This property is not characteristic of an ionic bond. Ionic compounds do not conduct electricity well as solids because the ions are held in fixed positions and cannot move to carry electric charge.
iii. dissolves in water to form a solution that contains mostly ions - This property is characteristic of an ionic bond. Ionic compounds can dissociate into their constituent ions when dissolved in water, resulting in a solution in which the majority of species are ions.
iv. dissolves to form a solution that contains mostly molecules - This property is not characteristic of an ionic bond. An ionic compound dissolved in water would yield a solution containing mostly ions, not molecules.
v. good electricity conductor when melted - This property is characteristic of an ionic bond. When an ionic compound is melted, the ions become free to move and carry electric charge, allowing it to conduct electricity.
vi. forms solid crystals - This property is characteristic of an ionic bond. Ionic compounds usually have a regular repeating crystal lattice structure in the solid state.
Based on the above analysis, the properties that are characteristic of an ionic bond are iii, v, and vi.
Therefore, the correct answer is option c. iii, v, vi.