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Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Châtelier’s principle. Consider the dissolution of silver iodide:
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Some common aldehydes and ketones are popularly known by their common names used historically and predate the IUPAC nomenclature.   
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Related Experiment Video

Updated: Feb 6, 2026

Generation of Electronic Cigarette Aerosol by a Third-Generation Machine-Vaping Device: Application to Toxicological Studies
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Generation of Electronic Cigarette Aerosol by a Third-Generation Machine-Vaping Device: Application to Toxicological Studies

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E-cigarette users commonly stealth vape in places where e-cigarette use is prohibited.

Jessica M Yingst1, Courtney Lester1, Susan Veldheer1

  • 1Department of Public Health Sciences, Penn State College of Medicine, Hershey, Pennsylvania, USA.

Tobacco Control
|August 12, 2018
PubMed
Summary

Stealth vaping, or discreet electronic cigarette use, is common among experienced users, with over two-thirds reporting the behavior. This practice often occurs at work and in public venues, highlighting a need for further research into its implications.

Keywords:
addictionelectronic nicotine delivery devicespublic policy

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Area of Science:

  • Public Health
  • Behavioral Science
  • Tobacco Control

Background:

  • Stealth vaping, defined as discreet electronic cigarette (e-cigarette) use in prohibited areas, lacks formal study despite anecdotal evidence of its prevalence.
  • Understanding stealth vaping is crucial for public health initiatives and regulatory efforts concerning e-cigarette use.

Purpose of the Study:

  • To formally investigate the prevalence and characteristics of stealth vaping behavior among experienced adult e-cigarette users.

Main Methods:

  • A follow-up survey of a longitudinal cohort study of experienced adult e-cigarette users was conducted in January 2017.
  • Participants reported on the occurrence, frequency, and locations of stealth vaping, with logistic regression used to identify predictors.

Main Results:

  • 64.3% of participants reported ever engaging in stealth vaping, with 52.5% doing so in the past week.
  • Common locations for stealth vaping include work (46.8%), bars/nightclubs (42.1%), and restaurants (37.7%).
  • Predictors of stealth vaping included greater nicotine dependence and ownership of smaller devices intended for discreet use.

Conclusions:

  • Stealth vaping is a widespread behavior among experienced e-cigarette users.
  • Further research is necessary to explore the motivations behind stealth vaping and its potential health and safety consequences.
  • Findings can inform the development of interventions to mitigate the public health impact of stealth vaping.