2.2.1 The pH Scale

• What does the pH scale measure?

  Acidity or alkalinity
• What is the pH range for acidic solutions?

  0 to 6
• Lemon juice is an example of a substance with a pH in the acidic range.
• Order the categories of the pH scale from most acidic to most alkaline:

  1️⃣ Acidic

  2️⃣ Neutral

  3️⃣ Alkaline
• A solution with a pH of 5 is considered alkaline.

  False
• Acids have a soapy feel.

  False
• What does the pH scale measure?

  Acidity or alkalinity
• Arrange the following pH categories from most acidic to most alkaline.

  1️⃣ Acidic (0-6)

  2️⃣ Neutral (7)

  3️⃣ Alkaline (8-14)
• What is the pH of pure water?

  7
• What is the range of pH for alkaline solutions?

  8 to 14
• Which category has a sour taste and can corrode metals?

  Acidic
• Laundry detergent, with a pH of 9-11, is effective due to its alkaline
• The pH scale ranges from 0 to 14.
• Match the category with its pH range:

  Acidic ↔️ 0-6

  Neutral ↔️ 7

  Alkaline ↔️ 8-14
• What does alkaline solutions feel like?

  Soapy
• What is a common characteristic of acidic solutions?

  Corrosion
• What is the pH range of acids?

  0 to 6
• Which type of solution is corrosive?

  Acidic
• A neutral solution has a pH value of 7
• The pH scale ranges from 0 to 14.


  True
• Match the pH category with its examples.

  Acidic ↔️ Lemon juice ||| Vinegar

  Neutral ↔️ Pure water

  Alkaline ↔️ Baking soda ||| Bleach
• The pH scale is used to measure both acidity and alkalinity.


  True
• The pH of everyday substances affects their use and safety.


  True
• Soil with a pH of 6-7 is optimal for plant growth.


  True
• A pH value of 7 indicates a neutral solution.


  True
• What is the pH of pure water?

  7
• The pH scale measures only acidity, not alkalinity.

  False
• Solutions with a pH value from 8 to 14 are referred to as alkaline or basic.
• Match the characteristic with the correct type of solution:

  Sour taste ↔️ Acid

  Bitter taste ↔️ Base
• The pH scale measures the acidity or alkalinity of a substance.
• What is the characteristic taste of alkaline solutions?

  Bitter
• Lemon juice, with a pH of 2-3, is an example of a acidic
• Acidic solutions can corrode metals due to their chemical properties.


  True
• Neutral solutions have a pH of 7
• The pH scale ranges from 0 to 14
• What is the ideal pH range for drinking water?

  6.5-8.5