The indicator methyl orange has been added to both of the...

The indicator methyl orange has been added to both of the following solutions. Based on the colors, classify each statement as true or false: (a) The $\mathrm{pH}$ of solution $\mathrm{A}$ is definitely less than 7.00 . (b) The pH of solution $\mathrm{B}$ is definitely greater than $7.00 .$ (c) The pH of solution B is greater than that of solution A. $[$ Section 16.4$]$

The indicator methyl orange has been added to both of the following solutions. Based on the colors, classify each statement as true or false:
(a) The $\mathrm{pH}$ of solution $\mathrm{A}$ is definitely less than 7.00 .
(b) The pH of solution $\mathrm{B}$ is definitely greater than $7.00 .$
(c) The pH of solution B is greater than that of solution A. $[$ Section 16.4$]$

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Key Concepts

pH Scale

The pH scale is a numerical scale used to measure the acidity or basicity of a solution. It ranges typically from 0 to 14, where values less than 7 indicate acidic conditions, a value of 7 indicates neutral conditions, and values greater than 7 indicate basic conditions. Understanding the pH scale is essential for interpreting the behavior of indicators and the outcome of acid-base reactions.

Acid-Base Indicators

Acid-base indicators are substances that change color in response to variations in the pH of a solution. They work by undergoing a chemical change in structure when they donate or accept protons, thereby displaying different colors depending on whether the environment is acidic or basic.

Indicator Transition Range

The indicator transition range is the specific pH interval over which an acid-base indicator changes color. For example, an indicator might display one color in strongly acidic conditions and another in basic conditions, with the visible change occurring within a narrow pH range. This range is key to interpreting pH measurements based on color observations.

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