Periodic Trends and Chemical Reactions

This video tutorial covers a range of AP Chemistry topics through multiple-choice questions. It includes stoichiometry, acid-base reactions, photoelectron spectra, solubility, kinetics, equilibrium, and electrochemistry. The video also provides insights into lab procedures, periodic trends, and specific heat calculations, offering strategies to tackle common exam traps.

What is the limiting reagent when 10 grams of iron reacts with 10 grams of sulfur to form iron (II) sulfide?

• Iron

• Sulfur

• Iron (II) sulfide

• None, they are in perfect stoichiometric ratio

Which of the following represents a correct Bronsted-Lowry acid-base conjugate pair?

• H2O and OH-

• HNO3 and NO3-

• H2PO4- and HPO4 2-

• HCl and Cl-

In a photoelectron spectrum, what does a smaller spike typically represent?

• A filled p orbital

• A half-filled p orbital

• A filled s orbital

• A half-filled s orbital

Which of the following solutions will have the highest concentration of silver ions when AgCl is added?

• 1.0 M HCl solution

• 1.0 M NaCl solution

• 1.0 M KCl solution

• Pure water

What is the partial pressure of argon in a container with equal masses of neon and argon, given the total pressure is 12 atm?

• 6 atm

• 4 atm

• 8 atm

• 12 atm

Which of the following species has the electron configuration of a noble gas?

• Br+

• Sr2+

• Cl-

• K+

In a galvanic cell, what happens to the mass of the anode during operation?

• It fluctuates

• It remains the same

• It decreases

• It increases

Which of the following changes would cause the reverse reaction to speed up in a system at equilibrium?

• Decreasing the temperature in an endothermic reaction

• Increasing the temperature in an exothermic reaction

• Removing some reactant

• Adding more product

Which of the following is a nonpolar molecule with polar bonds?

• H2O

• CO2

• NH3

• CH4

Which statement is true regarding the periodic trends of lithium and cesium?

• Cesium has a higher ionization energy than lithium.

• Lithium has a higher electronegativity than cesium.

• Cesium has a smaller atomic radius than lithium.

• Lithium and cesium have the same atomic radius.