Answers CR Chemistry S1 Q3050OXIonic Bonding

Ionic Bonding Answers

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Which is an aspect of the kinetic-molecular theory and can be used to explain the behavior of plasmas?

Particle spacing can allow a very high density.

Particle kinetic energy is independent of temperature.

Particles vibrate quickly in stationary positions.

Particles exchange energy through elastic collisions.

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A student is using a copper strip and a strong chlorine solution in her experiment. Which of these is a chemical property of one of her materials?

density of the copper strip

reactivity of the copper strip

odor of the chlorine solution

color of the chlorine solution

Which statement best explains why heating a liquid affects its viscosity?

The molecules move faster at higher temperatures and overcome attractions more easily.

The molecules move faster at higher temperatures, and the attractions between them increase.

The molecules move slower at higher temperatures and overcome attractions more easily.

The molecules move slower at higher temperatures, and the attractions between them decrease.

Water’s molar mass is 18.01 g/mol. The molar mass of glycerol is 92.09 g/mol. At 25°C, glycerol is more viscous than water. Which substance has the stronger intermolecular attraction?

glycerol because it has a larger molar mass

glycerol because it is more viscous and has a larger molar mass

water because it has a lower molar mass

water because it is less viscous and has a lower molar mass

Bromine gas in a container is heated over a flame. What happens to the average kinetic energy of the bromine particles?

It decreases rapidly.

It increases quickly.

It remains the same.

It decreases slowly.

Which term best describes liquid behavior under pressure?

incompressible

compressed

immiscible

surfactant

Which description best characterizes the motion of particles in a solid?

slow but able to move past one another

fast and widely spaced

not moving

vibrating around fixed positions

Which postulate of the kinetic-molecular theory applies to the particles of a liquid?

They do not move freely but vibrate in a stationary position.

They can be compressed, which causes a large change in volume.

They have so much kinetic energy that their intermolecular forces are negligible.

They have enough kinetic energy to easily slide by each other.

Substance X has a fixed volume, and the attraction between its particles is strong. Substance Y has widely spread out particles and can be compressed. What can most likely be concluded about these substances?

Substance X is a crystal, and substance Y is a liquid.

Substance X is a gas, and substance Y is a plasma.

Substance X is a plasma, and substance Y is a crystal.

Substance X is a solid, and substance Y is a plasma.

Which is an intensive property of a substance?

density

volume

length

mass

A student performs the following experiment.Step 1: She pours a colorless solution into a beaker that contains another colorless liquid. Yellow particles appear in the liquid.Step 2: She lets the yellow particles settle in the beaker and then separates the colorless liquid by decantation.What has most likely occurred in the beaker?

a chemical change in step 1 and a physical change in step 2

a physical change in step 1 and a chemical change in step 2

chemical changes in both step 1 and step 2

physical changes in both step 1 and step 2

A plasma that has particles that never collide frequently enough to exchange kinetic energy and never reach a temperature equal to the surroundings is categorized as a

thermal plasma.

ionized plasma.

low density plasma.

nonthermal plasma.

Which low-energy state of condensed matter is characterized by structural rigidity and resistance to changes of shape or volume?

gas

liquid

plasma

solid

How does the motion of particles in the sun’s plasma compare to the motion of particles in a solid?

Particles in both the plasma and a solid move around to fill available space.

Particles in the plasma move randomly, but particles in a solid vibrate in one place.

Particles in the plasma have low kinetic energy, but particles in a solid have high kinetic energy.

Particles in both the plasma and a solid are made up of fast-moving electrons and cations.

Which reason best explains why plasmas are good conductors of electricity?

They have mobile charged particles.

They are at extremely high temperatures.

They are made up of particles in fixed positions.

They have slow-moving nuclei that carry electricity.

Which of the following can easily form an ionic bond with a cation?

NH4+

PO43–

What leads to the formation of an ionic bond with Hg2+?

the attraction of a noble gas

the attraction of an NH4+ ion

the attraction of a group 1 element

the attraction of an SO42– ion

Which statement correctly describes the phosphate ion, ?

It is composed of one phosphorus atom and four oxygen atoms covalently bonded together, and there is a –3 charge distributed over the entire ion.

It is composed of one phosphorus atom and four oxygen atoms covalently bonded together, and there is a –3 charge on the phosphorus atom.

It is composed of one phosphorus atom and four oxygen atoms ionically bonded together, and there is a –3 charge distributed over the entire ion.

It is composed of one phosphorus atom and four oxygen atoms ionically bonded together, and there is a –3 charge on the phosphorus atom.

Which statement indicates that a substance may be an ionic compound?

It has a low melting point.

It is made up of molecules.

It can be flattened by a force.

It is made up of a crystal lattice.

Which pair of elements will form an ionic bond?

N and O

K and Br

C and Cl

Fe and Ni

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Ionic Bonding Answers

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