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Related Concept Videos

Precipitation Processes01:12

Precipitation Processes

441
The experimental conditions in a gravimetric analysis should be optimized to maximize the particle size and purity of the obtained precipitate. Ideally, the concentration of the precipitating reagent should be low with effective stirring to maintain low relative supersaturation for the growth of large crystals. In homogeneous precipitation, the precipitant is slowly generated by a chemical reaction in the solution to avoid local reagent excesses. For example, urea decomposes gradually to...
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Precipitation and Co-precipitation01:17

Precipitation and Co-precipitation

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Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
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Precipitation Gravimetry01:03

Precipitation Gravimetry

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Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
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Design Example: Analyzing Capacity Contours for Flood Risk Assessment01:17

Design Example: Analyzing Capacity Contours for Flood Risk Assessment

42
Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...
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Prediction Intervals01:03

Prediction Intervals

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The interval estimate of any variable is known as the prediction interval. It helps decide if a point estimate is dependable.
However, the point estimate is most likely not the exact value of the population parameter, but close to it. After calculating point estimates, we construct interval estimates, called confidence intervals or prediction intervals. This prediction interval comprises a range of values unlike the point estimate and is a better predictor of the observed sample value, y. 
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Rapidly Varying Flow01:24

Rapidly Varying Flow

57
Rapidly varying flow (RVF) in open channels is characterized by abrupt changes in flow depth over a short distance, with the rate of depth change relative to distance often approaching unity. These flows are inherently complex due to their transient and multi-dimensional nature, making exact analysis difficult. However, approximate solutions using simplified models provide valuable insights into their behavior.Key Features of Rapidly Varying FlowRVF is commonly observed in scenarios involving...
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Updated: Jun 19, 2025

Watershed Planning within a Quantitative Scenario Analysis Framework
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Correction: Improved runoff forecasting based on time-varying model averaging method and deep learning.

Jinlou Ruan, Yang Cui, Kai Xiang

    Plos One
    |July 24, 2024
    PubMed
    Summary
    This summary is machine-generated.

    This study corrects a previously published article DOI. The correction ensures accurate citation and referencing for scientific research. This improves the integrity of the scientific record.

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    Area of Science:

    • Scientific Publishing
    • Scholarly Communication
    • Research Integrity

    Context:

    • Ensuring accuracy in scientific literature is crucial.
    • Proper citation and referencing are fundamental to academic integrity.
    • Corrections are a necessary part of the scholarly publishing process.

    Purpose:

    • To correct an error in a previously published article's digital object identifier (DOI).
    • To maintain the accuracy and retrievability of scientific publications.
    • To uphold standards of scholarly communication.

    Summary:

    • A correction has been issued for the article with DOI 10.1371/journal.pone.0274004.
    • This correction addresses an error in the article's DOI.
    • The update ensures proper identification and access to the research.

    Impact:

    • Facilitates accurate citation and avoids misattribution.
    • Enhances the reliability of the scientific record.
    • Supports seamless access to the corrected research article.