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Related Concept Videos

Precipitation Titration: Endpoint Detection Methods01:19

Precipitation Titration: Endpoint Detection Methods

4.7K
In argentometric precipitation titrations, endpoints can be detected visually by the Mohr, Volhard, and Fajans methods. In the Mohr method, adding a soluble chromate indicator gives an initial yellow color to the analyte solution. As the titrant is added, the first excess of silver ions forms a red silver chromate precipitate, marking the endpoint. The solution pH should be maintained at about 8 by adding solid CaCO3.
In the Volhard method, a standard excess of AgNO3 is first added to the...
4.7K
Temperature Measurement Sites01:14

Temperature Measurement Sites

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A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
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Precipitation of Ions03:11

Precipitation of Ions

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Predicting Precipitation
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
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Thermosensation01:43

Thermosensation

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Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
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Vapor Pressure02:34

Vapor Pressure

38.9K
When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase molecules move randomly about, they will occasionally collide with the surface of the condensed phase, and in some cases, these collisions will result in the molecules re-entering the condensed phase. The change from the gas phase to the liquid is called condensation. When the rate of condensation becomes equal to the rate of vaporization, neither the amount of the liquid nor the amount of the vapor...
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Precipitation Titration: Overview01:26

Precipitation Titration: Overview

9.6K
Precipitation titration involves the reaction of a titrant and an analyte to generate an insoluble precipitate. While precipitation titration uses various precipitating agents, silver nitrate is the most common precipitating reagent; titrations involving Ag+ are called argentometric titrations. Usually, the endpoint in a precipitation titration can be detected by visual indicators.
A precipitation titration curve demonstrates the change in concentration of the titrant or analyte upon adding the...
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Related Experiment Video

Updated: Jan 13, 2026

Nanostructured Ag-zeolite Composites as Luminescence-based Humidity Sensors
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Perovskite-Based Humidity Sensor.

Dongjin Han1, Yutian Wang1, Jie Li1

  • 1State Key Laboratory of Biobased Fiber Manufacturing Technology, Tianjin University of Science and Technology, Tianjin 300457, P. R. China.

ACS Applied Materials & Interfaces
|January 7, 2026
PubMed
Summary

Perovskite humidity sensors offer high sensitivity and rapid response for environmental and smart applications. This review details their structure, mechanisms, and performance enhancement strategies for future potential.

Keywords:
humidity-responsiveperovskitesensing performancesensorstimuli-responsive

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Area of Science:

  • Materials Science
  • Sensor Technology
  • Environmental Monitoring

Background:

  • Perovskite materials are gaining attention for humidity sensing due to their excellent properties.
  • Current applications span environmental monitoring, healthcare, and smart devices.

Purpose of the Study:

  • To comprehensively review the recent advancements in perovskite-based humidity sensors.
  • To elucidate the fundamental aspects of perovskite materials and sensor mechanisms.
  • To explore strategies for improving sensor performance and future application potential.

Main Methods:

  • Literature review of perovskite materials, sensor structures, and fabrication techniques.
  • Analysis of perovskite crystal morphology, formation, and interface influence mechanisms.
  • Examination of performance enhancement strategies for perovskite humidity sensors.

Main Results:

  • Perovskite humidity sensors exhibit high sensitivity, rapid response, and eco-friendliness.
  • Understanding crystal morphology and interface mechanisms is crucial for optimizing sensor performance.
  • Various strategies exist to enhance the interface performance of these sensors.

Conclusions:

  • Perovskite-based humidity sensors are highly promising for diverse applications.
  • Further research into interface engineering and material optimization is needed.
  • This review provides a foundation for future development in perovskite humidity sensing technology.