Skip to main content
Ch.16 - Acid-Base Equilibria
Brown - Chemistry: The Central Science 14th Edition
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoBrown 14th EditionCh.16 - Acid-Base EquilibriaProblema 3
Capitolo 16, Problema 3

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 pH of solution A is definitely less than 7.00. (b) The pH of solution B is definitely greater than 7.00. (c) The pH of solution B is greater than that of solution A.

Guida verificata passo dopo passo
1
insert step 1> Understand that methyl orange is a pH indicator that changes color depending on the acidity or basicity of a solution.
insert step 2> Recall that methyl orange changes from red at a pH of 3.1 to yellow at a pH of 4.4.
insert step 3> Consider the color of solution A after adding methyl orange. If the solution is red, it indicates a pH less than 3.1. If it is yellow, the pH is above 4.4.
insert step 4> If solution A is orange, it suggests a pH between 3.1 and 4.4.
insert step 5> Conclude that if solution A is red or orange, the pH is definitely less than 7.00. If it is yellow, further information is needed to determine if the pH is less than 7.00.

Risposta video verificata per un problema simile:

Questa soluzione video è stata consigliata dai nostri tutor come utile per risolvere questo problema.
Durata del video:
2m

Concetti chiave

Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.

pH Scale

The pH scale measures the acidity or basicity of a solution, ranging from 0 to 14. A pH less than 7 indicates an acidic solution, while a pH greater than 7 indicates a basic solution. A pH of exactly 7 is considered neutral. Understanding the pH scale is essential for interpreting the results of acid-base indicators like methyl orange.
Video consigliato:
Percorso guidato
02:33
The pH Scale

Acid-Base Indicators

Acid-base indicators are substances that change color in response to changes in pH. Methyl orange, for example, turns red in acidic solutions (pH < 3.1) and yellow in neutral to basic solutions (pH > 4.4). Knowing how these indicators behave at different pH levels helps in determining the acidity or basicity of a solution based on its color.
Video consigliato:
Percorso guidato
04:30
Acid-Base Indicators

Color Change Interpretation

Interpreting the color change of an indicator in a solution is crucial for determining its pH. If methyl orange is red, it suggests the solution is acidic (pH < 3.1), while a yellow color indicates a neutral or basic solution (pH > 4.4). This understanding allows for accurate classification of the solution's pH based on the observed color.
Video consigliato:
Percorso guidato
01:53
Chemical Changes
Pratica correlata
Domanda del libro di testo

The probe of the pH meter shown here is sitting in a beaker that contains a clear liquid. You are told the liquid is pure water, a solution of HCl(aq), or a solution of KOH(aq). (b) If the liquid is one of the solutions, what is its molarity?

1100
views
Domanda del libro di testo

The probe of the pH meter shown here is sitting in a beaker that contains a clear liquid. (c) Why is the temperature given on the pH meter?

358
views
1
rank