AP Chemistry - Unit 4 - Thou Shall Not Forget

What is the oxidation number of P in PO₄³⁻?

• 3

• 5

• 4

• 2

What do bases do in terms of protons?

• Accept protons

• Donate protons

• Neutralize acids

• Increase acidity

What do acids do in terms of protons?

• Accept protons

• Donate protons

• Neutralize protons

• Transform protons

What is the pH range of bases?

• pH < 4

• pH = 7

• pH > 7

• pH = 14

What is the role of an oxidizing agent in a chemical reaction?

• It donates electrons and is oxidized.

• It accepts electrons and is reduced.

• It remains unchanged during the reaction.

• It increases the temperature of the reaction.

What two substances are produced in combustion reactions?

• Water Vapor and Carbon Dioxide

• Oxygen and Nitrogen

• Hydrogen and Methane

• Carbon Monoxide and Sulfur Dioxide

What is the pH range of acids?

• pH > 7

• pH = 7

• pH < 7

• pH = 14

What is the process of gaining electrons called?

• Oxidation

• Reduction

• Ionization

• Decomposition

What is the significance of the pH scale in chemistry?

• It measures the acidity or basicity of a solution.

• It determines the temperature of a solution.

• It indicates the concentration of solutes in a solution.

• It measures the density of a solution.

What is the general formula for combustion reactions?

• Hydrocarbon + O₂ → CO₂ + H₂O

• Hydrocarbon + O₂ → CO + H₂

• Hydrocarbon + O₂ → H₂ + O₂

• Hydrocarbon + O₂ → C + H₂O