What color does a base turn red litmus paper?

What color does a base turn red litmus paper?

• A. Red
• B. Green
• C. Blue
• D. Yellow

Answer: (C)

When a base is introduced to red litmus paper, it turns blue. This reaction indicates the pH level of the substance; bases have a pH greater than 7 and are typically alkaline. The color change from red to blue is a classic test for identifying basic substances. In a more general sense, litmus paper serves as a pH indicator, where red litmus paper is used specifically to detect the presence of a base. This is a fundamental concept in chemistry, particularly in understanding acid-base reactions and pH levels. Understanding this transformation is essential for estheticians as it can relate to the use of products with varying pH levels in skin treatments. The other choices do not represent the expected results when testing with litmus paper in a basic context. Red remains unchanged when exposed to an acidic solution, while colors like green and yellow do not represent any result in this specific litmus test scenario.

When a base is introduced to red litmus paper, it turns blue. This reaction indicates the pH level of the substance; bases have a pH greater than 7 and are typically alkaline. The color change from red to blue is a classic test for identifying basic substances.

In a more general sense, litmus paper serves as a pH indicator, where red litmus paper is used specifically to detect the presence of a base. This is a fundamental concept in chemistry, particularly in understanding acid-base reactions and pH levels. Understanding this transformation is essential for estheticians as it can relate to the use of products with varying pH levels in skin treatments.

The other choices do not represent the expected results when testing with litmus paper in a basic context. Red remains unchanged when exposed to an acidic solution, while colors like green and yellow do not represent any result in this specific litmus test scenario.