AP Chemistry Midterm Review

Front

What is the electron configuration for Sc in Sc(NO3)3?

Back

Front

What is the net ionic equation for the precipitation reaction between sodium carbonate and magnesium sulfate?

Back

Front

How do you determine the formal charge on an atom in a molecule?

Back

Formal charge is calculated using the formula: Formal Charge = (Valence Electrons) - (Non-bonding Electrons) - (Bonding Electrons/2).

Front

Which factors influence the melting point of ionic compounds?

Back

The melting point is influenced by lattice energy and the charges of the ions involved.

Front

What is the oxidation number of nitrogen in NO2^-?

Back

The oxidation number of N in NO2^- is +3.

Front

Define lattice energy.

Back

Lattice energy is the energy released when gaseous ions combine to form an ionic solid.

Front

What is Coulomb's Law?

Back

Coulomb's Law states that the force between two charged objects is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.

Front

How does the charge of ions affect lattice energy?

Back

Higher charges on ions result in greater lattice energy due to stronger electrostatic forces.

Front

What is the significance of the octet rule in chemistry?

Back

The octet rule states that atoms tend to gain, lose, or share electrons to achieve a full outer shell of eight electrons.

Front

What is a precipitation reaction?

Back

A precipitation reaction occurs when two solutions react to form an insoluble solid, known as a precipitate.