Question

define ph scale and universal indicator​

Answer 1

Answer:

Universal indicator and the pH scale

This is measured using the pH scale , which runs from pH 0 to pH 14. Universal indicator has many different colour changes, from red for strongly acidic solutions to dark purple for strongly alkaline solutions. In the middle, neutral pH 7 is indicated by green.

Explanation:

pH range Description Colour

3–6 Weak acid Orange or yellow

7 Neutral Green

8–11 Weak alkali Blue

> 11 Strong alkali Violet or Indigo

Some of the most widely-used pH testing tools are pH indicators, including phenolphthalein (range pH 8.2 to 10.0; colorless to pink), bromthymol blue (range pH 6.0 to 7.6; yellow to blue), and litmus (range pH 4.5 to 8.3; red to blue).

Answer 2

$\huge\rm\underline\purple{Answer:-}$

$\huge\mathcal\color{teal}PH \:scale:-$

pH is a measure of how acidic/basic water is. The range goes from 0 - 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base. pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water.

$\huge\mathcal\color{teal} universal$

$\huge\mathcal\color{teal} indicators:-$

A universal indicator is a pH indicator made of a solution of several compounds that exhibits several smooth colour changes over a wide range pH values to indicate the acidity or alkalinity of solutions.

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