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Related Concept Videos

Weak Base Solutions03:21

Weak Base Solutions

24.8K
Some compounds produce hydroxide ions when dissolved by chemically reacting with water molecules. In all cases, these compounds react only partially and so are classified as weak bases. These types of compounds are also abundant in nature and important commodities in various technologies. For example, global production of the weak base ammonia is typically well over 100 metric tons annually, being widely used as an agricultural fertilizer, a raw material for chemical synthesis of other...
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Titration of a Weak Acid with a Weak Base01:08

Titration of a Weak Acid with a Weak Base

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Weak acids and bases do not undergo dissociation completely, and titrations between these two are rarely studied. When such studies are performed, say, for the titration of a weak acid with a weak base, the titration curve plots the change in pH as a function of the volume of base added. Take the titration of acetic acid with ammonia, for instance. During the titration, these two species form ammonium acetate and water, but the pH change is slow and gradual.
As a result, there is no simple...
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Measurement of Dynamic Force Acted on Water Strider Leg Jumping Upward by the PVDF Film Sensor07:17

Measurement of Dynamic Force Acted on Water Strider Leg Jumping Upward by the PVDF Film Sensor

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The protocol here is dedicated to investigating the free and quick maneuvering of water strider on water surface. The protocol includes observing the microstructure of legs and measuring the adhesion force when departing from water surface at different...
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Titration Calculations: Weak Acid - Strong Base03:55

Titration Calculations: Weak Acid - Strong Base

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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:
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Uncertainty in Measurement: Accuracy and Precision03:37

Uncertainty in Measurement: Accuracy and Precision

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Scientists typically make repeated measurements of a quantity to ensure the quality of their findings and to evaluate both the precision and the accuracy of their results. Measurements are said to be precise if they yield very similar results when repeated in the same manner. A measurement is considered accurate if it yields a result that is very close to the true or the accepted value. Precise values agree with each other; accurate values agree with a true value. 
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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping09:48

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

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We demonstrate use of a fiber optic distributed sensor for mapping the temperature field of mixing air jets. The Rayleigh scattering-based sensor generates thousands of data points along a single fiber to provide exceptional spatial resolution that is unattainable with traditional sensors such as...
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Related Experiment Video

Updated: Jan 19, 2026

Weak Base Solutions: pH and Dissociation Constant Calculations
03:21

Weak Base Solutions: pH and Dissociation Constant Calculations

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High-precision temperature sensor based on weak measurement.

Yanjia Li, Hongjing Li, Jingzheng Huang

    Optics Express
    |September 13, 2019
    PubMed
    Summary
    This summary is machine-generated.

    This study demonstrates a high-precision temperature sensor using weak measurement and spectrum analysis. The sensor achieves remarkable precision, allowing for flexible modulation of its operating range and sensitivity.

    More Related Videos

    Measurement of Dynamic Force Acted on Water Strider Leg Jumping Upward by the PVDF Film Sensor
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    Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
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    Related Experiment Videos

    Last Updated: Jan 19, 2026

    Weak Base Solutions: pH and Dissociation Constant Calculations
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    Weak Base Solutions: pH and Dissociation Constant Calculations

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    Measurement of Dynamic Force Acted on Water Strider Leg Jumping Upward by the PVDF Film Sensor
    07:17

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    Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
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    Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

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    Area of Science:

    • Optics and Photonics
    • Metrology
    • Materials Science

    Background:

    • Accurate temperature sensing is crucial for various scientific and industrial applications.
    • Traditional sensors often face limitations in precision, operating range, or robustness to imperfections.
    • Weak measurement techniques offer novel approaches to enhance sensor performance.

    Purpose of the Study:

    • To demonstrate a high-precision temperature sensor utilizing weak measurement and spectrum domain analysis.
    • To investigate the modulation of operating temperature range and precision through postselection phase.
    • To evaluate the sensor's robustness and experimental performance.

    Main Methods:

    • Implementation of a high-precision temperature sensor based on weak measurement principles.
    • Utilizing spectrum domain analysis for temperature-dependent spectral shift detection.
    • Introducing an extra phase to postselection for modulating sensor characteristics.
    • Experimental validation of temperature sensitivity and precision.

    Main Results:

    • Achieved a temperature precision of 2.4 × 10-6°C with a standard spectrometer.
    • Demonstrated convenient modulation of the operating temperature range and precision.
    • Observed robustness of spectral shifts to practical imperfections.
    • Experimentally obtained a temperature sensitivity of 16.16 nm/°C.

    Conclusions:

    • The developed weak measurement-based sensor offers high-precision temperature detection.
    • The sensor design allows for adaptable operating ranges and enhanced precision.
    • This technology holds promise for advanced metrology and applications requiring sensitive temperature monitoring.