AP Chemistry Practice Quiz #2

What is the molarity of a solution prepared by dissolving 58.5 grams of NaCl in enough water to make 0.5 liters of solution? (Molar mass of NaCl = 58.5 g/mol)

• 0.5 M

• 1.0 M

• 2.0 M

• 4.0 M

Which of the following statements is true about an endothermic reaction?

• The surroundings get cooler.

• The system loses heat.

• It is spontaneous at all temperatures.

What is the pH of a 0.001 M HCl solution?

• 1

• 2

• 3

• 4

Which of the following electron configurations corresponds to an atom in an excited state?

• 0.2 M/s

• 0.4 M/s

• 0.6 M/s

• 0.8 M/s