What effect does a base have on litmus paper?

What effect does a base have on litmus paper?

• A. It changes it to red
• B. It keeps it blue
• C. It changes it to blue
• D. It makes it colorless

Answer: (C)

When litmus paper is exposed to a base, it changes from red to blue. This property of litmus paper is used as an indicator to test for acidity or basicity in a solution. Bases, such as sodium hydroxide or potassium hydroxide, cause the color change because they have a higher pH level, indicating a basic solution. In this test, if the litmus paper remains red, it indicates that the solution is acidic, while a change to blue signifies that a basic solution is present. Therefore, the transformation of the litmus paper from red to blue illustrates the characteristic behavior of bases in chemical reactions.

When litmus paper is exposed to a base, it changes from red to blue. This property of litmus paper is used as an indicator to test for acidity or basicity in a solution. Bases, such as sodium hydroxide or potassium hydroxide, cause the color change because they have a higher pH level, indicating a basic solution.

In this test, if the litmus paper remains red, it indicates that the solution is acidic, while a change to blue signifies that a basic solution is present. Therefore, the transformation of the litmus paper from red to blue illustrates the characteristic behavior of bases in chemical reactions.