Question

A certain bacterium grows best in an acidic medium. In an experiment with this bacterium, the $\mathrm{pH}$ must be maintained at around $5 .$ What indicator should be added to indicate a $\mathrm{pH}$ of 5 and to monitor changes in the $\mathrm{pH}$ of the medium?

Name: Problem 25, Chapter 21: General Chemistry
Uploaded: 2021-10-24T07:54:18-08:00
Duration: 1 min 3 s
Channel: Adriano Chikande
Description: A certain bacterium grows best in an acidic medium. In an experiment with this bacterium, the pH must be maintained at around 5 . What indicator should be added to indicate a pH of 5 and to monitor changes in the pH of the medium?

   A certain bacterium grows best in an acidic medium. In an experiment with this bacterium, the $\mathrm{pH}$ must be maintained at around $5 .$ What indicator should be added to indicate a $\mathrm{pH}$ of 5 and to monitor changes in the $\mathrm{pH}$ of the medium?

General Chemistry

Donald A. McQuarrie,… 4th Edition

Chapter 21, Problem 25

Instant Answer

Solved by Expert Adriano Chikande

10/24/2021

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The bacterium grows best in an acidic medium, specifically at a pH of around 5. Show more…

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A certain bacterium grows best in an acidic medium. In an experiment with this bacterium, the $\mathrm{pH}$ must be maintained at around $5 .$ What indicator should be added to indicate a $\mathrm{pH}$ of 5 and to monitor changes in the $\mathrm{pH}$ of the medium?

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Key Concepts

Acid-Base Indicators

Acid-base indicators are substances that change color within specific pH ranges, making them useful for determining the acidity or basicity of a solution. They are vital in both analytical chemistry and biological experiments where maintaining or monitoring pH is crucial for reaction conditions or microorganism growth.

Indicator pH Range

The indicator pH range refers to the span of pH values over which an indicator changes color. It is important to select an indicator whose transition range encompasses the target pH for the experiment, ensuring accurate and observable changes in color as the pH shifts.

Bromocresol Green

Bromocresol Green is an example of an acid-base indicator suitable for detecting changes in the pH range around 5. Its color transition occurs within a range that includes pH 5, making it appropriate for experiments that require close monitoring of acidic conditions in a biological medium.

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