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Related Concept Videos

pH Scale02:41

pH Scale

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Hydronium and hydroxide ions are present both in pure water and in all aqueous solutions, and their concentrations are inversely proportional as determined by the ion product of water (Kw). The concentrations of these ions in a solution are often critical determinants of the solution’s properties and the chemical behaviors of its other solutes. Two different solutions can differ in their hydronium or hydroxide ion concentrations by a million, billion, or even trillion times. A common means of...
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Decision Making01:20

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Decision-making is a fundamental cognitive process that involves evaluating alternatives and selecting among them. This process can range from simple choices, such as deciding what to wear, to complex decisions, like choosing a major in college or a career path. The complexity of the decision often dictates the approach we use, which can be broadly categorized into two types: automatic and controlled decision-making.
Automatic decision-making is fast, intuitive, and relies on gut feelings...
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Calculating the Equilibrium Constant02:46

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The equilibrium constant for a reaction is calculated from the equilibrium concentrations (or pressures) of its reactants and products. If these concentrations are known, the calculation simply involves their substitution into the Kc expression.
For example, gaseous nitrogen dioxide forms dinitrogen tetroxide according to this equation:
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Calculating Standard Free Energy Changes02:49

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The free energy change for a reaction that occurs under the standard conditions of 1 bar pressure and at 298 K is called the standard free energy change. Since free energy is a state function, its value depends only on the conditions of the initial and final states of the system. A convenient and common approach to the calculation of free energy changes for physical and chemical reactions is by use of widely available compilations of standard state thermodynamic data. One method involves the...
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Calculating pH Changes in a Buffer Solution02:45

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A buffer can prevent a sudden drop or increase in the pH of a solution after the addition of a strong acid or base up to its buffering capacity; however, such addition of a strong acid or base does result in the slight pH change of the solution. The small pH change can be calculated by determining the resulting change in the concentration of buffer components, i.e., a weak acid and its conjugate base or vice versa. The concentrations obtained using these stoichiometric calculations can be used...
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In engineering applications, the representation of the numerical value is critical. Presenting or reporting the answer is one of the essential parts of engineering practices. Numerical calculations are performed using handheld calculators or computers since numerically accurate answers are always preferred.
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Calculated decisions: Glasgow Coma Scale

Daniel Runde1

  • 1Department of Emergency Medicine, University of Iowa Hospitals and Clinics, Iowa City, IA

Emergency Medicine Practice
|September 6, 2018
PubMed
Summary

The Glasgow Coma Scale (GCS) assesses coma depth using eye, verbal, and motor responses. This scale is crucial for evaluating neurological status in critically ill patients.

Area of Science:

  • Neurology
  • Critical Care Medicine

Background:

  • Coma represents a state of profound unconsciousness requiring accurate assessment.
  • Standardized scales are essential for objective evaluation of neurological impairment.

Purpose of the Study:

  • To describe the Glasgow Coma Scale (GCS) as a tool for estimating coma severity.
  • To outline the core components of the GCS assessment.

Main Methods:

  • The GCS utilizes three key components: eye, verbal, and motor responses.
  • Each component is scored individually to derive a total GCS score.

Main Results:

  • The GCS provides a numerical score reflecting the level of consciousness.
  • Higher scores indicate better neurological function, while lower scores suggest severe impairment.

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Conclusions:

  • The Glasgow Coma Scale is a widely adopted and reliable method for assessing patients with altered consciousness.
  • Its objective criteria facilitate consistent communication among healthcare professionals regarding patient status.