2007-06-19 18:47:13 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Botany
Is a chemical compound that is added in small amounts to a solution so that the pH (acidity or alkalinity) of the solution can be determined easily. Hence a pH indicator is a chemical detector for hydronium ions (H3O+) (or Hydrogen ions (H+) in the Arrhenius model).
2007-06-19 20:19:53 · answer #1 · answered by Tubby 5 · 0⤊ 0⤋
Indicators are chemicals added to other solutions or products to determine the presence of specific substances. Besides the pH indicators mentioned above, IKI turns a dark blue-black color in the presence of starch. Also when hydrogen peroxide is placed on samples of earth, if organic material is present, you get bubbles of oxygen released.
2007-06-19 21:04:16 · answer #2 · answered by kt 7 · 0⤊ 0⤋
In chemistry, they are compounds used to identify other unknown compounds and/or elements by the byproduct or result of thier reaction with those in question. For example litmus paper is an "indicator" of acidity ( I think acids cause it to turn purple and based cause it to turn red-or vice versa).
2007-06-19 18:55:32 · answer #3 · answered by Anonymous · 0⤊ 0⤋