Question

11. The teacher shows scholars two flasks containing clear liquids. One flask contains acetic acid, and the

other contains ammonia. The teacher dips methyl orange indicator paper into each liquid and the
scholars observe the indicator paper changing colors. The teacher then holds the Indicator paper inside
the flask, but not submerged into the liquid. The scholars observe the paper changing color due to the
particles in the gaseous state. What makes indicator paper change color from a distance?





by the way this is science work

Answer 1

Indicator paper changes color due to the presence of specific gases or vapors. When the indicator paper is placed inside the flask, but not submerged in the liquid, it is exposed to the vapors or gases that are present in the flask. These vapors or gases can interact with the indicator paper, causing a chemical reaction that results in a change in color.

In the case of the acetic acid and ammonia, the indicator paper likely changed color due to the presence of gaseous acetic acid and ammonia molecules. The indicator paper contains a chemical that is sensitive to these particular gases, and the color change is a way of indicating the presence of these gases.

It is important to note that indicator paper is not a precise measurement tool, and the color change may not be consistent or accurate. It is often used as a rough guide or as a qualitative rather than quantitative method of analysis.