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Related Concept Videos

Titration Calculations: Strong Acid - Strong Base02:28

Titration Calculations: Strong Acid - Strong Base

33.8K
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:
33.8K
Strong Acid and Base Solutions03:22

Strong Acid and Base Solutions

35.4K
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.
35.4K
Titration of a Strong Acid with a Strong Base01:23

Titration of a Strong Acid with a Strong Base

10.3K
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...
10.3K
Titration Calculations: Weak Acid - Strong Base03:55

Titration Calculations: Weak Acid - Strong Base

49.1K
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:
49.1K
Titration of a Weak Acid with a Strong Base01:30

Titration of a Weak Acid with a Strong Base

4.4K
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...
4.4K
Titration of Polyprotic Acids with a Strong Base01:23

Titration of Polyprotic Acids with a Strong Base

2.8K
Titration of a polyprotic acid, which contains multiple ionizable protons, involves distinct dissociation steps, each with its own dissociation constant (Ka). Each successive Ka is weaker than the previous one. In the titration of a polyprotic acid like sulfurous acid with a strong base such as sodium hydroxide, the base first neutralizes the initial ionizable proton, forming an intermediate species (e.g., hydrogen sulfite ions). This step's titration curve resembles that of a weak...
2.8K

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Strong 3D Printing by TPMS Injection.

Xin Yan, Cong Rao, Lin Lu

    IEEE Transactions on Visualization and Computer Graphics
    |May 7, 2019
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    Summary
    This summary is machine-generated.

    This study introduces a novel method combining 3D printing with material injection to create strong, durable objects. By using triply periodic minimal surfaces (TPMS) for internal structures, this approach enhances material distribution and structural integrity for 3D printed models.

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    Area of Science:

    • Materials Science
    • Additive Manufacturing
    • Computational Engineering

    Background:

    • 3D printed objects are increasingly common in various fields.
    • Achieving strength and durability in 3D printed models using standard techniques remains a challenge.
    • Current methods often focus on designing internal structures for support and resistance.

    Purpose of the Study:

    • To propose a novel method for enhancing the strength and durability of 3D printed objects.
    • To investigate the combination of 3D printing and material injection.
    • To develop smart interior structures for improved mechanical properties.

    Main Methods:

    • Utilizing triply periodic minimal surfaces (TPMS) to design internal support structures.
    • Employing TPMS to create channels for material injection within the 3D printed object.
    • Locally optimizing TPMS channels based on the object's stress field to reinforce weak regions.
    • Injecting solidified materials into the internal channels post-printing.

    Main Results:

    • Demonstrated a method to achieve strong 3D printed objects through combined 3D printing and injection.
    • Successfully utilized TPMS for designing smooth, connected internal channels for material distribution.
    • Showcased the ability to inject various materials into the object's interior efficiently.
    • Validated the effectiveness of the proposed technique in enhancing structural integrity.

    Conclusions:

    • The combination of 3D printing and material injection offers an effective approach to producing strong and durable 3D printed objects.
    • TPMS provide a robust framework for designing optimized internal structures that facilitate material injection.
    • This method allows for versatile material integration, significantly improving the mechanical performance of 3D printed parts.