Tuesday, October 26, 2021

Difference between pH paper and universal indicator

Generally, the blue litmus paper, red litmus paper, pH paper, universal indicators, and pH meter are used to determine the pH. The pH paper is an indicator that changes as per the substance, in which it is dipped, Although a universal indicator is a liquid/solution substance that is dropped into a sample and it changes the substance as per the pH (acidic or basic).

The range of pH is between the pH 0 to pH 14 scale, in which below pH 07 is considered as acidic, above pH 07-14 is considered basic and pH 07 is neutral, it depends on the concentration of hydrogen ions which present in the substance.

What is pH paper?

A pH paper is a piece of paper strips are saturated with a pH indicator, it is used to determine if a solution is basic, acidic, or neutral. It is determined by dipping a piece of paper in the solution and its color changes according to the pH.
The chemical flavin causes a pH paper to change color in different solutions. This anthocyanin molecule is soluble in water and changes color when exposed to different types of liquids.

What is a universal indicator?

A universal indicator is a combination of various indicators that displays a range of colors depending on the pH of any sample solution. It comes in two types: a liquid ethanol solution and a pH paper soaked in an indicator solution.

Difference between the pH paper and universal indicator:

The major difference between the pH paper and universal indicator is the pH paper gives the exact pH of the substance, whereas the universal indicator is used to find out whether it is acid or alkaline, or neutral.


FAQ (Frequently Asked Questions):


Is universal indicator and pH paper the same?
The universal indicator and pH paper both are different things; however, they are used for the same purposes, which interprets how acidic or basic a solution is.

Why pH paper is called a universal indicator?
pH paper is known as a universal indicator, as it exhibits diverse colors at various concentrations of hydrogen ions in a solution. A universal indicator may exist in paper form or as a solution.

What is the difference between a universal indicator and a pH meter?
A pH meter is a device that measures pH digitally using a probe (Electrode) and voltmeter, while a universal indicator is a mixture of color-changing indicators that represent the pH of a solution.

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