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Related Concept Videos

Urinary Tract Calculi III: Medical Management01:30

Urinary Tract Calculi III: Medical Management

The diagnosis of renal calculi involves several imaging techniques, including non-contrast CT scans and ultrasound. These methods help visualize kidney stones, assess their size and location, and detect possible obstructions. Additionally, Measuring urine pH is useful for diagnosing specific stone types, such as struvite (alkaline pH) and uric acid stones (acidic pH). Cystine stones are primarily linked to cystinuria, a genetic condition. A urinalysis helps detect blood in the urine (hematuria)...
Determining the pH of Salt Solutions04:08

Determining the pH of Salt Solutions

The pH of a salt solution is determined by its component anions and cations. Salts that contain pH-neutral anions and the hydronium ion-producing cations form a solution with a pH less than 7. For example, in ammonium nitrate (NH4NO3) solution, NO3− ions do not react with water whereas NH4+ ions produce the hydronium ions resulting in the acidic solution. In contrast, salts that contain pH-neutral cations and the hydroxide ion-producing anions form a solution with a pH greater than 7. For...
Weak Base Solutions03:21

Weak Base Solutions

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...
Ionic Crystal Structures02:42

Ionic Crystal Structures

Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Weak Acid Solutions04:02

Weak Acid Solutions

Few compounds act as strong acids. A far greater number of compounds behave as weak acids and only partially react with water, leaving a large majority of dissolved molecules in their original form and generating a relatively small amount of hydronium ions. Weak acids are commonly encountered in nature, being the substances partly responsible for the tangy taste of citrus fruits, the stinging sensation of insect bites, and the unpleasant smells associated with body odor. A familiar example of a...
Urinary Tract Calculi I: Introduction01:28

Urinary Tract Calculi I: Introduction

Renal calculi, or kidney stones, are solid deposits of minerals and salts formed inside the kidneys. In medical terminology, "calculus" refers to the stone itself, while "lithiasis" describes the process of stone formation. Depending on their location within the urinary system, these stones may be classified as either urolithiasis, when situated within the urinary tract, or nephrolithiasis, when located within the kidneys. Each term signifies the specific impact of the stone.Predisposition...

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Related Experiment Video

Updated: Jun 28, 2026

Natural Transformation, Protein Expression, and Cryoconservation of the Filamentous Cyanobacterium Phormidium lacuna
11:47

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A computer model of struvite solution chemistry.

W D Scott1, T J Wrigley, K M Webb

  • 1Environmental Science, School of Biological and Environmental Sciences, Murdoch University, Murdoch 6150, Western Australia.

Talanta
|August 1, 1991
PubMed
Summary
This summary is machine-generated.

A new computer model accurately describes struvite solution chemistry, aiding wastewater treatment and kidney stone research. This model accounts for major ions without approximation, fitting laboratory and literature data.

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Area of Science:

  • Environmental Chemistry
  • Computational Chemistry
  • Biomineralization

Background:

  • Struvite (magnesium ammonium phosphate) precipitation is relevant in wastewater treatment and biological systems like kidney stone formation.
  • Accurate modeling of struvite solution chemistry is crucial for understanding and controlling these processes.

Purpose of the Study:

  • To develop a flexible computer model for describing struvite solution chemistry.
  • To identify key equilibrium constants influencing model output and derive solubility constants.

Main Methods:

  • Development of a computer model incorporating the electroneutrality equation.
  • Inclusion of major ions with retained relationships, allowing for greater input variability.
  • Validation of model results against laboratory and literature data.

Main Results:

  • The developed model accurately describes struvite solution chemistry.
  • Key equilibrium constants affecting model output were identified.
  • Solubility constants for struvite were derived.

Conclusions:

  • The computer model provides a robust tool for studying struvite chemistry.
  • Applications include optimizing wastewater treatment processes and investigating kidney stone formation mechanisms.