<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0187-893X</journal-id>
<journal-title><![CDATA[Educación química]]></journal-title>
<abbrev-journal-title><![CDATA[Educ. quím]]></abbrev-journal-title>
<issn>0187-893X</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Facultad de Química]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-893X2021000300038</article-id>
<article-id pub-id-type="doi">10.22201/fq.18708404e.2021.3.72021</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Deduciendo las relaciones entre las unidades de concentración en disoluciones líquidas]]></article-title>
<article-title xml:lang="en"><![CDATA[Deducting the relationships between the concentration units in liquid solutions]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García García]]></surname>
<given-names><![CDATA[José Luís]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Pedagógica Nacional  ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<volume>32</volume>
<numero>3</numero>
<fpage>38</fpage>
<lpage>51</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-893X2021000300038&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-893X2021000300038&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-893X2021000300038&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Las conversiones entre unidades de concentración son un problema, tanto a nivel educativo como al nivel profesional, pues se emplean tradicionalmente técnicas numéricas, que son triviales, y pueden causar problemas incluso para individuos con entrenamiento. En este artículo planteamos una propuesta algebraica, deducir todas las conversiones de las unidades de concentración más comunes en un sistema líquido, y luego poner a prueba dichas fórmulas numérica y dimensionalmente. La aplicación de estas ecuaciones a problemas numéricos, permite un análisis dimensional explícito de situaciones que en algunas fuentes no tienen sentido dimensional, aunque numéricamente sean correctas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Conversions between concentration units are problematic, both at school and professional level, since numerical techniques are traditionally used, which are numerically trivial, they can be problematic even for professionals. In this paper, we propose an algebraic alternative, it is to deduce all the conversions of the most common concentration units in a liquid system, and then test them numerically and dimensionally. The application of these equations to numerical problems allows an explicit dimensional analysis to situations that in some sources do not have dimensional sense, although they are numerically correct.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Conversiones de unidades]]></kwd>
<kwd lng="es"><![CDATA[concentración molar]]></kwd>
<kwd lng="es"><![CDATA[concentración molal]]></kwd>
<kwd lng="es"><![CDATA[fracción molar]]></kwd>
<kwd lng="es"><![CDATA[análisis dimensional]]></kwd>
<kwd lng="en"><![CDATA[Unit conversions]]></kwd>
<kwd lng="en"><![CDATA[molar concentration]]></kwd>
<kwd lng="en"><![CDATA[molal concentration]]></kwd>
<kwd lng="en"><![CDATA[mole fraction]]></kwd>
<kwd lng="en"><![CDATA[dimensional analysis]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="">
<collab>Engineering ToolBox</collab>
<source><![CDATA[Density of aqueous solutions of inorganic sodium salts]]></source>
<year>2017</year>
</nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="">
<collab>Engineering ToolBox</collab>
<source><![CDATA[Density of Ethanol Water Mixtures]]></source>
<year>2019</year>
</nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chalk]]></surname>
<given-names><![CDATA[S. J.]]></given-names>
</name>
<name>
<surname><![CDATA[McNaught]]></surname>
<given-names><![CDATA[A. D.]]></given-names>
</name>
<name>
<surname><![CDATA[Wilkinson]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<collab>IUPAC</collab>
<source><![CDATA[]]></source>
<year>2019</year>
<edition>2</edition>
<publisher-loc><![CDATA[Oxford ]]></publisher-loc>
<publisher-name><![CDATA[Blackwell Scientific Publications]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Korbag]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<name>
<surname><![CDATA[Saleh]]></surname>
<given-names><![CDATA[S. M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Designing simple equations to fully understand the conversions among common concentration units]]></article-title>
<source><![CDATA[Libyan Journal of Science &amp; Technology]]></source>
<year>2017</year>
<volume>6</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>14-8</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
