Acids and Bases

What is the pH scale and what does it measure?

• The pH scale measures the weight of a substance.

• The pH scale measures the temperature of a substance.

• The pH scale measures the acidity or alkalinity of a substance.

• The pH scale measures the color of a substance.

Explain the process of neutralization reactions and provide an example.

• When ammonia reacts with acetic acid to form ammonium acetate

• When sulfuric acid reacts with potassium hydroxide to form hydrogen gas and potassium sulfate

• When hydrochloric acid (HCl) reacts with sodium hydroxide (NaOH) to form water (H2O) and sodium chloride (NaCl).

• When vinegar reacts with baking soda to form carbon dioxide and water

What are acid-base indicators and how are they used?

• They are substances that change color depending on the temperature of a solution and are used to visually determine the acidity or basicity of a solution.

• They are substances that change color depending on the pH of a solution and are used to visually determine the acidity or basicity of a solution.

• They are substances that change color depending on the pressure of a solution and are used to visually determine the acidity or basicity of a solution.

• They are substances that change color depending on the concentration of a solution and are used to visually determine the acidity or basicity of a solution.

Differentiate between strong acids and weak acids, providing examples of each.

• Strong acids: KOH, H3PO4; Weak acids: Ca(OH)2, Mg(OH)2

• Strong acids: NaCl, HNO3; Weak acids: H2O, NH3

• Strong acids: H2O, NH3; Weak acids: NaCl, HNO3

• Strong acids: HCl, H2SO4; Weak acids: CH3COOH, H2CO3

Define conjugate acids and bases and give an example of a conjugate acid-base pair.

• NH3 (acid) and NH4+ (conjugate base)

• An example of a conjugate acid-base pair is HCl (acid) and Cl- (conjugate base).

• H2O (acid) and OH- (conjugate base)

• NaOH (acid) and H2O (conjugate base)

What is the pH of a neutral solution?

• 3

• 10

• 7

• 5

How does the pH of a solution change as it becomes more acidic?

• The pH remains the same

• The pH becomes neutral

• The pH decreases

• The pH increases

What happens to the pH of a solution when a strong acid is added to it?

• pH decreases

• pH becomes neutral

• pH remains the same

• pH increases

Explain the concept of titration in the context of acids and bases.

• Titration is a technique used to measure the color of acids and bases

• Titration is a method used to separate acids and bases from a mixture

• Titration is a process of heating acids and bases to determine their concentration

• Titration is a technique used to determine the concentration of an acid or base by reacting it with a solution of known concentration.

Discuss the importance of maintaining the pH balance in the human body.

• The body can function normally with extreme pH levels

• Maintaining pH balance only affects physical appearance

• It has no impact on health

• It is essential for overall health and well-being.