Trivia Question 1: What Colour Does Litmus Paper Become If It Is In Contact With An Alkaline?

When it comes to testing the acidity or alkalinity of a substance, litmus paper is a popular choice. This simple yet effective tool can quickly provide valuable information about the pH level of a solution. But what happens when litmus paper comes into contact with an alkaline?

Alkaline substances are those with a pH level greater than 7. They are often found in common household items such as baking soda, soap, and some cleaning products. When litmus paper encounters an alkaline substance, it undergoes a fascinating transformation.

The color change in litmus paper when it comes into contact with an alkaline is quite distinct. It turns blue! This shift in color is a clear indicator that the substance being tested is alkaline in nature. This reaction occurs due to litmus paper's ability to change its molecular structure in the presence of alkaline compounds.

Litmus paper is made from a water-soluble dye extracted from lichens. This dye is sensitive to changes in pH levels and can exist as either a protonated or deprotonated form. In an acidic environment, the dye is protonated and appears red. However, when an alkaline substance is introduced, it causes the dye to deprotonate, resulting in a blue color change.

It is important to note that litmus paper is a qualitative indicator, meaning it provides a general indication of whether a substance is acidic or alkaline. It does not provide precise pH measurements. For a more accurate assessment, pH test strips or digital pH meters are recommended.

In conclusion, when litmus paper comes into contact with an alkaline substance, its color changes from red to blue. This visual change is a reliable indication that the substance being tested is alkaline. Litmus paper is a valuable tool for quick and easy pH testing, but for precise measurements, alternative methods should be employed.