pH stands for something along the lines of "Power of hydrogen". It represents the "power" ... or exponent ... of the hydrogen ion concentration.
Each indicator has a specific change of color when the pH is changed.
The indicator is bromothymol blue.
This is a pH indicator.
The acidity range is a part of the pH scale.
A pH indicator is used only to measure the pH of the solution.
cabbage juice is a natural pH indicator
a pH indicator
Each indicator has a specific change of color when the pH is changed.
An indicator can provide exact pH if you are using the neutralization titration. Paper strip pH indicator are not an exact measurement but a high, medium, and low indication of acids and bases.
pH range of indicator should be in the rapid pH gradient.
ph-indicator strips (colorpHast)
The indicator is bromothymol blue.
An example of an indicator would be Phenol Red, or Universal Indicator. Depending on the pH range of the indicator and the pH range of the substrates you would use the appropriate indicator.
Hardness
indicator
Antacids have a pH under 7.
This is a pH indicator.