AP Chemistry Unit 3 & 5 basic review

In paper chromatography, if water is the mobile phase, what kind of substance will move up the farthest?

• polar substance

• non polar substance

List the 4 Intermolecular forces from weakest to strongest

• hydrogen bonding, ion-dipole, london dispersion, dipole dipole

• london dispersion, hydrogen bonding, ion-dipole, dipole dipole

• london dispersion, dipole dipole, hydrogen bonding, ion-dipole

• dipole dipole, hydrogen bonding, ion-dipole, london dispersion

List ALL the Intermolecular forces that exist in PCl₃

• hydrogen bonding, london dispersion

• london dispersion, hydrogen bonding, dipole dipole

• london dispersion, dipole dipole

• london dispersion

“More polarizable” refers to which Intermolecular Force?

• hydrogen bonding

• london dispersion

• dipole dipole

The dotted line is a representation of a hydrogen bond.

• True

• False

Real gases behave most like an ideal gas at what conditions of temperature and pressure?

• High T, Low P

• High P, Low T

• High V, Low T

What is the rate law for the reaction with this slow elementary step? 2A --> B

• rate = k[A]²

• rate = k[B]²

• rate = k[A][B]

• rate = k[A]

How does a catalyst speed up a reaction?

• Adding more reactant

• Providing a pathway that has a lower activation energy

• Increasing the activation energy

• Increasing binding energy

If you quadruple the concentration and the rate quadruples, what order is this reaction (with respect to the reactant concentration that was quadrupled)?

• zero

• first

• second

The half-life of strontium-90 is 25 years. How much strontium-90 will remain after 100 years if the initial amount is 4.0 g?

• 3.0g
• 0.25mg
• 0.3g
• 0.25g