CH301 - Unit 2 Exam 1 Review

Front

What is the Lewis structure for Ethanol (C2H5OH)?

Back

The Lewis structure for Ethanol shows two carbon atoms bonded to each other, with one carbon bonded to three hydrogen atoms and the other carbon bonded to two hydrogen atoms and one hydroxyl group (OH). The oxygen atom has two lone pairs of electrons.

Front

How many unshared pairs of electrons are on the oxygen atom in Ethanol?

Back

There are 2 unshared pairs of electrons on the oxygen atom in Ethanol.

Front

How many bonds exist between the two carbon atoms in Ethanol?

Back

There is one bond between the two carbon atoms in Ethanol.

Front

Which compound has the highest lattice energy: KI, KCl, LiCl, or KBr?

Back

LiCl has the highest lattice energy among the given compounds.

Front

What is lattice energy?

Back

Lattice energy is the energy released when one mole of an ionic crystalline compound is formed from its gaseous ions.

Front

Rank the bonds H-F, B-N, N-O, Be-H, C-F from greatest to least difference in electronegativity (DEN).

Back

H-F > C-F > B-N > Be-H > N-O.

Front

What is electronegativity?

Back

Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons.

Front

How many lone pairs are present in PF3?

Back

PF3 has 1 lone pair of electrons on the phosphorus atom.

Front

What is the significance of lone pairs in molecular geometry?

Back

Lone pairs affect the shape of a molecule by repelling bonding pairs, which can alter bond angles and overall geometry.

Front

What is the molecular geometry of PF3?

Back

The molecular geometry of PF3 is trigonal pyramidal due to the presence of one lone pair on phosphorus.