CPC 6.2 Ionic Compounds

Multiple Choice

What distinguishes a compound from a mixture?

• Compounds are physical combinations

• Compounds are chemical combinations of elements

• Compounds are always liquids

• Compounds are made of identical atoms

Multiple Choice

What is the electrostatic force that holds oppositely charged particles together called?

• Covalent bond

• Metallic bond

• Ionic bond

• Hydrogen bond

Multiple Choice

What forms when ionic bonds occur between metals and the nonmetal oxygen?

• Salts

• Acids

• Oxides

• Bases

Multiple Choice

What are most ionic compounds classified as?

• Acids

• Bases

• Salts

• Oxides

Multiple Choice

What do binary ionic compounds contain?

• Two metallic cations

• A metallic cation and a nonmetallic anion

• Two nonmetallic anions

• A metallic anion and a nonmetallic cation

Multiple Choice

What does "binary" mean in the context of compounds?

• Compounds contain three different elements

• Compounds contain only one element

• Compounds contain only two different elements

• Compounds contain four different elements

Multiple Choice

Which of the following is an example of a binary ionic compound?

• Water (H₂O)

• Carbon dioxide (CO₂)

• Calcium Oxide (CaO)

• Ammonia (NH₃)

Multiple Choice

In an ionic compound, what determines the ratio of positive to negative ions?

• The size of the ions

• The number of protons

• The number of electrons transferred

• The temperature of the environment

Multiple Choice

How are ions arranged in an ionic compound?

• Randomly scattered

• In a regular repeating pattern

• In a linear sequence

• In a circular formation

Multiple Choice

What results in the formation of a crystal lattice in an ionic compound?

• Weak attractions among ions

• Strong attractions among ions

• Random arrangement of ions

• Low Melting and Boiling Points

Multiple Choice

What is a crystal lattice?

• A two-dimensional geometric arrangement

• A random arrangement of particles

• A three-dimensional geometric arrangement of particles

• A single layer of ions

Multiple Choice

What determines the melting point, boiling point, and hardness of ionic compounds?

• The color of the compound

• The size of the ions

• The strength of electrical forces between particles

• The shape of the crystal lattice

Multiple Choice

Why do ionic crystals have high melting and boiling points?

• Because they are made of small particles

• Because ionic bonds are relatively weak

• Because ionic bonds are relatively strong

• Because they have a low density

Multiple Choice

What are the properties of ionic crystals?

• Soft, but hard to break

• Hard, rigid, brittle

• Malleable and ductile

• Elastic and flexible

Multiple Choice

Why are ionic crystals hard and rigid?

• Due to weak magnetic forces

• Due to strong attraction between electric charges

• Due to gravitational forces

• Due to weak chemical bonds

Multiple Choice

What happens when a force strong enough to overcome attractive forces is applied to ionic crystals?

• They become more flexible

• They melt

• They break

• They expand

Multiple Choice

What determines the ability of a material to conduct electricity?

• Freely moving charged particles

• The color of the material

• The temperature of the material

• Strength of ionic bonds in the material

Multiple Choice

Why are ionic solids poor conductors of electricity?

• Ions are locked in position by strong attractive forces

• Ions are free to move

• They have a high melting and boiling points

• Ionic solids are too small to adequately conduct

Multiple Choice

In what state do ionic compounds conduct electricity?

• In solution or a liquid state

• In a crystal or solid state

• In a gaseous state

• In a plasma state

Multiple Choice

What is an ionic compound whose aqueous solution conducts an electric current called?

• Electrolyte

• Insulator

• Conductor

• Semiconductor

Multiple Choice

Which solution shows high conductivity in the diagram?

• KCl

• Ethanol

• Acetic acid solution

• Water

Multiple Choice

What type of reaction absorbs energy?

• Exothermic

• Endothermic

• Ionic

• Combustion

Multiple Choice

What type of reaction releases energy?

• Endothermic

• Exothermic

• Neutralization

• Decomposition

Multiple Choice

The formation of ionic compounds from positive and negative ions is always:

• Endothermic

• Exothermic

• Neutral

• Reversible

Multiple Choice

What happens to the energy level when ions form a more stable system?

• It increases

• It decreases

• It remains the same

• It fluctuates

Multiple Choice

What is the energy required to separate 1 mol of ions of an ionic compound called?

• Bond energy

• Lattice energy

• Activation energy

• Ionization energy

Multiple Choice

What happens to the force of attraction as the lattice energy increases?

• It decreases

• It remains the same

• It becomes weaker

• It becomes stronger

Multiple Choice

What type of reaction is dissociation in terms of energy?

• Exothermic reaction

• Endothermic reaction

• Neutral reaction

• Spontaneous reaction

Multiple Choice

How is lattice energy related to ion size?

• Larger ions have greater lattice energy.

• Smaller ions have greater lattice energy.

• Ion size does not affect lattice energy.

• Lattice energy is only related to charge.

Multiple Choice

What happens to the electrostatic force of attraction between opposite charges as the distance between them decreases?

• It decreases.

• It remains the same.

• It increases.

• It becomes zero.

Multiple Choice

What is the effect of larger positive or negative charges on ionic bonds?

• They decrease lattice energy.

• They have no effect on lattice energy.

• They increase lattice energy.

• They make the bond weaker.

Multiple Choice

Which ion is described as having the same charge as potassium but being a smaller ion?

• Na+

• Cl-

• Br-

• K+

Multiple Choice

According to the diagram, which ion pair has a stronger attraction?

• Na+ and Cl-

• K+ and Br-

• Na+ and Br-

• K+ and Cl-

Multiple Choice

Which of the following is not an ionic compound?

• Magnesium oxide

• Sodium chloride

• Water

• Barium sulfate

Multiple Choice

Identify the binary ionic compound.

• H₂O

• C₆H₁₂O₆

• NaCl

• Be₃Al₂Si₆O₁₈

Multiple Choice

What term best describes the structure formed by the strong attractions among the positive ions and the negative ions in an ionic compound?

• a mineral deposit

• an ionic molecule

• a salt crystal

• a crystal lattice

Multiple Choice

Which of the following is true of ionic crystals?

• Ionic crystals require a large amount of energy to be broken.

• Ionic crystals have low melting points and high boiling points.

• Ionic crystals are malleable, not brittle.

• Ionic crystals conduct electricity in solid or liquid form, but not gas.

Multiple Choice

Which of the following is correct?

• Lattice energy is the energy needed for 1 mol of positive ions to bond with 1 mol of negative ions.

• Ions in an ionic compound are arranged in a random pattern.

• Ionic compounds are never electrolytes.

• Ionic compound properties are related to ionic bonding.