Skip to main content
Ch.16 - Acid-Base Equilibria
Brown - Chemistry: The Central Science 15th Edition
Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoBrown 15th EditionCh.16 - Acid-Base EquilibriaProblema 33
Capitolo 16, Problema 33

Calculate [H+] for each of the following solutions, and indicate whether the solution is acidic, basic, or neutral: (a) [OH-] = 0.00045 M (b) [OH-] = 8.8 × 10-9 M (c) a solution in which [OH-] is 100 times greater than [H+].

Guida verificata passo dopo passo
1
Identify the given concentration: \([OH^-] = 8.8 \times 10^{-9} \text{ M}\).
Use the water dissociation constant \(K_w = 1.0 \times 10^{-14}\) to find \([H^+]\) using the formula \([H^+] = \frac{K_w}{[OH^-]}\).
Substitute the given \([OH^-]\) value into the formula: \([H^+] = \frac{1.0 \times 10^{-14}}{8.8 \times 10^{-9}}\).
Calculate the \([H^+]\) concentration from the above expression.
Determine the nature of the solution: if \([H^+] > 1.0 \times 10^{-7}\) M, it's acidic; if \([H^+] < 1.0 \times 10^{-7}\) M, it's basic; if \([H^+] = 1.0 \times 10^{-7}\) M, it's neutral.

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:
3m

Concetti chiave

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

pH and pOH

pH is a measure of the hydrogen ion concentration in a solution, indicating its acidity or basicity. The pH scale ranges from 0 to 14, with values below 7 being acidic, 7 being neutral, and above 7 being basic. pOH, on the other hand, measures the hydroxide ion concentration and is related to pH through the equation pH + pOH = 14.
Video consigliato:
Percorso guidato
02:09
pH and pOH Calculations

Ion Product of Water (Kw)

The ion product of water (Kw) is the equilibrium constant for the self-ionization of water, defined as Kw = [H+][OH-] = 1.0 x 10^-14 at 25°C. This relationship allows us to calculate the concentration of hydrogen ions from the hydroxide ion concentration and vice versa, which is essential for determining the pH of a solution.
Video consigliato:
Percorso guidato
00:53
Production of Hydrogen Example

Acidic, Basic, and Neutral Solutions

A solution is classified as acidic if its pH is less than 7, basic if its pH is greater than 7, and neutral if its pH equals 7. The classification is determined by the relative concentrations of H+ and OH- ions in the solution, which can be calculated using the pH and pOH values derived from the concentrations of these ions.
Video consigliato:
Percorso guidato
01:04
Balancing Basic Redox Reactions
Pratica correlata
Domanda del libro di testo

Write the expression for the ion product constant for water, Kw.

645
views
Domanda del libro di testo

Write a chemical equation that illustrates the autoionization of water.

572
views
Domanda del libro di testo

Calculate 3OH-4 for each of the following solutions, and indicate whether the solution is acidic, basic, or neutral: (a) 3H+4 = 0.0505 M

415
views
Domanda del libro di testo

Calculate 3OH-4 for each of the following solutions, and indicate whether the solution is acidic, basic, or neutral: (c) a solution in which 3H+4 is 1000 times greater than 3OH-4.

339
views
Domanda del libro di testo

Calculate 3OH-4 for each of the following solutions, and indicate whether the solution is acidic, basic, or neutral: (b) 3H+4 = 2.5 * 10-10 M

394
views