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Titration Calculations: Strong Acid - Strong Base

Titration Calculations: Strong Acid - Strong Base

Calculating pH for Titration Solutions: Strong Acid/Strong Base
A titration is carried out for 25.00 mL of 0.100 M HCl (strong acid) with 0.100 M of a strong base NaOH. The pH at different volumes of added base solution can be calculated as follows:
(a) Titrant volume = 0 mL. The solution pH is due to the acid ionization of HCl. Because this is a strong acid, the ionization is complete and the hydronium ion molarity is 0.100 M. The pH of the solution is then:

Strong Acid and Base Solutions

Strong Acid and Base Solutions

A strong acid is a compound that dissociates completely in an aqueous solution and produces a concentration of hydronium ions equal to the initial concentration of acid. For example, 0.20 M hydrobromic acid will dissociate completely in water and produces 0.20 M of hydronium ions and 0.20 M of bromide ions.

Titration of a Strong Acid with a Strong Base

Titration of a Strong Acid with a Strong Base

During the titration of a strong acid with a strong base, pH calculations are primarily based on the concentration of residual hydronium or hydroxide ions. Initially, a strong acid like hydrochloric acid fully dissociates, creating hydronium and chloride ions, resulting in a low pH. The addition of a strong base like sodium hydroxide alters the concentration of hydronium ions by neutralizing them. As more base is added, the pH gradually increases. At the equivalence point, all hydronium ions...

Titration Calculations: Weak Acid - Strong Base

Titration Calculations: Weak Acid - Strong Base

Calculating pH for Titration Solutions: Weak Acid/Strong Base
For the titration of 25.00 mL of 0.100 M CH3CO2H with 0.100 M NaOH, the reaction can be represented as:

Titration of a Weak Base with a Strong Acid

Titration of a Weak Base with a Strong Acid

The titration curve of a weak base like ammonia with a strong acid like hydrochloric acid is the mirror image of the titration curve of a weak acid with a strong base.
Using the ICE table and substituting the Kb value, we calculate the initial pH of 50 mL of 0.1 M ammonia to be 11.11. Addition of 25 mL of 0.1 M hydrochloric acid to this solution of ammonia results in a buffer with an equal concentration of ammonia and ammonium ions. The pH of this buffer can be calculated by substituting these...

Titration of a Weak Acid with a Strong Base

Titration of a Weak Acid with a Strong Base

In titrating a weak acid with a strong base, different calculation methods are applied at various stages. Initially, the pH of a weak acid like acetic acid is calculated using its dissociation constant (Ka) and an ICE table. Upon addition of a strong base such as sodium hydroxide, a buffer forms, and its pH is determined using the Henderson-Hasselbalch equation. As more base is added and the titration reaches the halfway point, the pH becomes equal to the pKa of the acid, indicating equal...

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Related Experiment Video

Updated: Jan 29, 2026

Gold Nanoparticle Synthesis

Gold Nanoparticle Synthesis

Published on: July 10, 2021

Trihydrogen Formation on Gold Nanoparticles in Strong Laser Fields.

Ritika Dagar^1,2,3, Wenbin Zhang^1,4, Philipp Rosenberger¹

¹Department of Physics, Ludwig-Maximilians-Universität Munich, D-85748 Garching, Germany.

|January 27, 2026

Summary

The trihydrogen cation (H3+) is crucial for proton transfer. Nanoparticle shape significantly influences H3+ formation under laser fields, with faceted gold nanoparticles enhancing production through concentrated charge.

Keywords:

facets gold nanoparticles reaction nanoscopy reactivity surface emission

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Last Updated: Jan 29, 2026

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Area of Science:

Physical Chemistry
Materials Science
Nanotechnology

Background:

The trihydrogen cation (H3+) is vital in proton-transfer chemistry and astrochemical pathways.
Gas-phase H3+ formation is well-studied, but surface-mediated generation and morphology effects are less understood.
Gold nanoparticles (AuNPs) are suitable for studying nonequilibrium reactions due to charge localization and strong electric fields.

Purpose of the Study:

To investigate surface-mediated H3+ generation on gold nanoparticles.
To explore the influence of nanoparticle morphology on H3+ production efficiency.
To understand how strong-field interactions at metal interfaces drive nanoscale reactivity.

Main Methods:

Utilized reaction nanoscopy to spatially map H3+ production.
Exposed spherical and faceted gold nanoparticles to intense femtosecond laser fields.
Analyzed the correlation between nanoparticle morphology, charge density, and H3+ yield.

Main Results:

Demonstrated that nanoparticle morphology modulates surface charge density and reaction efficiency.
Observed enhanced H3+ yields on faceted nanoparticles compared to spherical ones.
Identified that sharp features on faceted particles concentrate charge, promoting molecular fragmentation and proton rearrangement.

Conclusions:

Nanoparticle morphology is a critical factor in controlling surface-mediated H3+ formation.
Strong-field interactions at metal interfaces can be harnessed to drive nanoscale chemical reactions.
This research opens avenues for advanced photocatalysis and tailored nanoscale reactivity.