AP Chemistry Unit 4 Review

Front

What are spectator ions?

Back

Spectator ions are ions that do not participate in the actual chemical reaction and remain unchanged in the solution.

Front

What type of intermolecular force (IMF) is present in polar molecules?

Back

Dipole-dipole interactions are present in polar molecules, where positive and negative ends of polar molecules attract each other.

Front

What is the difference between a chemical and a physical process?

Back

A chemical process involves a change in the chemical composition of substances, while a physical process involves changes in physical state or appearance without altering the chemical composition.

Front

What is an example of a chemical process?

Back

The reaction of carbon dioxide gas (CO2) to form solid carbon (C) and oxygen gas (O2) is a chemical process.

Front

What is an example of a physical process?

Back

The melting of ice (H2O(s) to H2O(l)) is a physical process, as it changes the state from solid to liquid without changing the chemical composition.

Front

What does the term 'ion-dipole' refer to?

Back

Ion-dipole interactions occur between an ion and a polar molecule, where the charge of the ion interacts with the dipole of the polar molecule.

Front

What is hydrogen bonding?

Back

Hydrogen bonding is a strong type of dipole-dipole interaction that occurs when hydrogen is bonded to highly electronegative atoms like nitrogen, oxygen, or fluorine.

Front

What is the significance of the phase diagram for a substance?

Back

A phase diagram shows the states of a substance (solid, liquid, gas) at different temperatures and pressures, indicating the conditions under which each phase exists.

Front

What is the role of Na+ and Cl- in the reaction involving Fe+3 and OH-?

Back

Na+ and Cl- are spectator ions in the reaction, meaning they do not participate in the formation of the precipitate Fe(OH)3.

Front

What is the definition of a precipitate?

Back

A precipitate is a solid that forms and separates from a liquid mixture during a chemical reaction.