<?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>S0187-893X2023000100100</article-id>
<article-id pub-id-type="doi">10.22201/fq.18708404e.2023.1.81816</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[The wood ash is alkaline]]></article-title>
<article-title xml:lang="es"><![CDATA[La ceniza de madera es alcalina]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Naumoska]]></surname>
<given-names><![CDATA[Aleksandra]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Stojanovska]]></surname>
<given-names><![CDATA[Marina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Petru&#353;evski]]></surname>
<given-names><![CDATA[Vladimir M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Ss. Cyril and Methodius University in Skopje  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Republic of North Macedonia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<volume>34</volume>
<numero>1</numero>
<fpage>100</fpage>
<lpage>107</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-893X2023000100100&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-893X2023000100100&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-893X2023000100100&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract A novel lecture experiment is arranged, that could be used as a demonstration of burning wood with chemical identification of the main products of the oxidation. Pieces of standard Chinese chopsticks were burned in pure oxygen. Ways of proving the obtained products are offered. The solid product shows strongly alkaline reaction (pH &gt; 11). For a maximum effect it is advisable to use a flow chamber (Petru&#353;evski and Najdoski, 2005). This experiment can be applied to teach processes of oxidation (burning), acids, bases and/or indicators. The experiment is suitable for classroom setting, providing an opportunity for active involvement of students in examining the properties of the resulting products.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Se organiza un novedoso experimento de lectura, que podría utilizarse como demostración de la quema de madera con identificación química de los principales productos de la oxidación. En realidad, se quemaron pedazos de palillos chinos estándar en oxígeno puro. Se ofrecen formas de probar los productos obtenidos. El producto sólido muestra una reacción fuertemente alcalina (pH &gt; 11). Para un efecto máximo, se recomienda utilizar una cámara de flujo (Petru&#353;evski y Najdoski, 2005). Este experimento se puede aplicar para enseñar procesos de oxidación (combustión), ácidos, bases y/o indicadores. El experimento es adecuado para el salón de clases, brindando una oportunidad para que los estudiantes participen activamente en el examen de las propiedades de los productos resultantes.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Active learning]]></kwd>
<kwd lng="en"><![CDATA[alkali]]></kwd>
<kwd lng="en"><![CDATA[chemistry education]]></kwd>
<kwd lng="en"><![CDATA[lecture experiments]]></kwd>
<kwd lng="en"><![CDATA[wood ash]]></kwd>
<kwd lng="es"><![CDATA[Aprendizaje activo]]></kwd>
<kwd lng="es"><![CDATA[álcali]]></kwd>
<kwd lng="es"><![CDATA[educación química]]></kwd>
<kwd lng="es"><![CDATA[experimentos de conferencias]]></kwd>
<kwd lng="es"><![CDATA[ceniza de madera]]></kwd>
</kwd-group>
</article-meta>
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