What substance turns different colors in an acid and a base?

Answer 1

The classification of chemicals that are sensitive to changes in pH are known as indicators. There are many long chemical names for many but something as common as purple Grape Juice will show a color change in the presence of changing pH.

Answer 2

The substance that changes color in response to different pH levels is called an acid-base indicator. One common example is litmus paper, which turns red in acidic solutions and blue in basic solutions. This color change is due to the indicator molecule's structure shifting between different forms depending on the concentration of hydrogen ions (H+) present in the solution.

Answer 3

The simplest one is Litmus Paper. In Acid it is red , in alkali/base it is Blue. At neutrality (water) it is white/pale yellow.

However, a more sensitive indicator is 'Universal Indicator'. It is a liquid and a drop or two is only needed to give an indication.

In strong acids it is deep red, slowly becoming paler, to orange and yellow as the acid strength weakens. At neutrality ( water) it is green . In Alkalis/Bases it is pale blue becomes darker to indigo as alkli strength increases.

A pH meter is an electronic device, with a probe, that is sensitive to the number of hydrogen ions present in the solution.

Answer 4

Litmus paper is a substance that changes color in the presence of an acid or a base. In an acidic solution, litmus paper turns red, while it turns blue in a basic solution. This color change is due to the pH-sensitive nature of litmus paper.

Answer 5

boil red cabbage in water, then take out the cabbage and save the water. The water will change color.

Answer 6

Litmus paper or litmus solution

Answer 7

litmus paper added in water

Answer 8

This substance is a pH indicator.

Answer 9

Indicator