<?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>S0187-893X2025000100029</article-id>
<article-id pub-id-type="doi">10.22201/fq.18708404e.2025.1.88964</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[&#8220;Mi casa, mi laboratorio&#8221;: un enfoque didáctico para la introducción al estudio de las reacciones redox utilizando materiales de bajo costo]]></article-title>
<article-title xml:lang="en"><![CDATA[&#8216;My house, my laboratory&#8217;: a didactic approach for the introduction to the study of redox reactions using low-cost materials]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Araújo]]></surname>
<given-names><![CDATA[José Luís]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hahn]]></surname>
<given-names><![CDATA[Marcelo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Saúde]]></surname>
<given-names><![CDATA[Isabel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidade de Aveiro CIDTFF Departamento de Educação e Psicologia]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidade do Porto Unidade de Ensino das Ciências Faculdade de Ciências]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidade do Porto Unidade de Ensino das Ciências Faculdade de Ciências]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2025</year>
</pub-date>
<volume>36</volume>
<numero>1</numero>
<fpage>29</fpage>
<lpage>40</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-893X2025000100029&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-893X2025000100029&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-893X2025000100029&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Este artículo presenta una propuesta de secuencia didáctica dirigida a estudiantes de secundaria. Se propone la exploración de indicadores ácido-base naturales con el fin de caracterizar diferentes soluciones acuosas. Luego, los estudiantes se enfrentan a un escenario desafiante e investigativo: la adición de lejía a un refresco de cola resulta en una reacción química que también implica cambios de color. Basándose en el protocolo desarrollado, los estudiantes llevarán a cabo ensayos experimentales para determinar si el refresco de cola es un indicador ácido-base. Para explicar los resultados obtenidos, los estudiantes llevarán a cabo una investigación cuyas conclusiones llevarán a la introducción del tema de las reacciones de oxidación-reducción. Con esta propuesta se busca fomentar la participación activa de los estudiantes en la construcción de su aprendizaje a través de actividades prácticas y experimentales, utilizando materiales cotidianos para promover su autonomía y, al mismo tiempo, estimular la curiosidad científica y el desarrollo de habilidades esenciales para la educación del siglo XXI. Además, el conocimiento que este enfoque didáctico contribuye significativamente a una comprensión más profunda de los conceptos fundamentales de la Química, promoviendo reflexiones más profundas sobre su relevancia en la sociedad actual.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract This article presents a proposal for a didactic sequence aimed at secondary school students. It proposes the exploration of natural acid-base indicators to characterize different aqueous solutions. Then, the students face a challenging and investigative scenario in which the addition of bleach to a cola drink results in a chemical reaction that involves color changes. Based on the developed protocol, the students will conduct experimental tests to determine if the cola drink can act as an acid-base indicator. To explain the results obtained, the students will conduct research, and their conclusions will lead to the introduction of the topic of oxidation-reduction reactions. This proposal aims to encourage the active participation of students in constructing their learning through practical and experimental activities, using everyday materials to promote their autonomy and, at the same time, stimulate scientific curiosity and the development of essential skills for 21st-century education. Additionally, the knowledge that this didactic approach contributes to a deeper understanding of fundamental Chemistry concepts, promoting more profound reflections on their relevance today.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[electroquímica]]></kwd>
<kwd lng="es"><![CDATA[educación secundaria]]></kwd>
<kwd lng="es"><![CDATA[indagación]]></kwd>
<kwd lng="es"><![CDATA[redox]]></kwd>
<kwd lng="es"><![CDATA[indicadores]]></kwd>
<kwd lng="en"><![CDATA[electrochemistry]]></kwd>
<kwd lng="en"><![CDATA[secondary education]]></kwd>
<kwd lng="en"><![CDATA[inquiry]]></kwd>
<kwd lng="en"><![CDATA[redox]]></kwd>
<kwd lng="en"><![CDATA[indicators]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="">
<collab>American Chemical Society</collab>
<source><![CDATA[Importance of hands-on laboratory science]]></source>
<year>2020</year>
</nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Basheer]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Hugerat]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Kortam]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Hofstein]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The effectiveness of teachers&#8217; use of demonstrations for enhancing students&#8217; understanding of and attitudes to learning the oxidation-reduction concept]]></article-title>
<source><![CDATA[EURASIA Journal of Mathematics Science and Technology Education]]></source>
<year>2017</year>
<volume>13</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>555-70</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Butts]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Smith]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[What do students perceive as difficult in H.S.C. chemistry?]]></article-title>
<source><![CDATA[Australian Science Teachers&#8217; Journal]]></source>
<year>1987</year>
<volume>32</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>45-51</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cardellini]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Chemistry: Why the subject is difficult?]]></article-title>
<source><![CDATA[Educación Química]]></source>
<year>2012</year>
<volume>23</volume>
<page-range>305-10</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="book">
<collab>Direção Geral de Educação.</collab>
<source><![CDATA[Aprendizagens essenciais de física e química A, 11.º ano]]></source>
<year>2018</year>
<publisher-loc><![CDATA[Lisboa ]]></publisher-loc>
<publisher-name><![CDATA[Direção Geral de Educação]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Duban]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Aydo&#287;du]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Yüksel]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Classroom teachers&#8217; opinions on science laboratory practices]]></article-title>
<source><![CDATA[Universal Journal of Educational Research]]></source>
<year>2019</year>
<volume>7</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>772-80</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Eymur]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Çetin]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Geban]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Analysis of the alternative conceptions of preservice teachers and high school students concerning atomic size]]></article-title>
<source><![CDATA[Journal of Chemical Education]]></source>
<year>2013</year>
<volume>90</volume>
<numero>8</numero>
<issue>8</issue>
<page-range>976-80</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gillespie]]></surname>
<given-names><![CDATA[R. J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The great ideas of chemistry]]></article-title>
<source><![CDATA[Journal of Chemical Education]]></source>
<year>1997</year>
<volume>74</volume>
<numero>7</numero>
<issue>7</issue>
<page-range>862-4</page-range></nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hahn]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Weber]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Bleach]]></article-title>
<source><![CDATA[Reference module in biomedical sciences]]></source>
<year>2022</year>
<publisher-name><![CDATA[Elsevier]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hesse]]></surname>
<given-names><![CDATA[J. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Anderson]]></surname>
<given-names><![CDATA[C. W.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Students&#8217; conceptions of chemical change]]></article-title>
<source><![CDATA[Journal of Research in Science Teaching]]></source>
<year>1992</year>
<volume>29</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>277-99</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hofstein]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The role of laboratory in science teaching and learning]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Taber]]></surname>
<given-names><![CDATA[K. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Akpan]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
</person-group>
<source><![CDATA[Science education: An international course companion]]></source>
<year>2017</year>
<page-range>357-68</page-range><publisher-loc><![CDATA[Rotterdam ]]></publisher-loc>
<publisher-name><![CDATA[SensePublishers]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Irwanto, Saputro]]></surname>
<given-names><![CDATA[A. D.]]></given-names>
</name>
<name>
<surname><![CDATA[Rohaeti]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Prodjosantoso]]></surname>
<given-names><![CDATA[A. K.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Using inquiry-based laboratory instruction to improve critical thinking and scientific process skills among preservice elementary teachers]]></article-title>
<source><![CDATA[Eurasian Journal of Educational Research]]></source>
<year>2019</year>
<volume>19,</volume>
<page-range>151-70</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Johnstone]]></surname>
<given-names><![CDATA[A. H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Why is science difficult to learn? Things are seldom what they seem]]></article-title>
<source><![CDATA[Journal of Computer Assisted Learning]]></source>
<year>1991</year>
<volume>7</volume>
<numero>2</numero>
<issue>2</issue>
</nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kempler]]></surname>
<given-names><![CDATA[P. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Boettcher]]></surname>
<given-names><![CDATA[S. W.]]></given-names>
</name>
<name>
<surname><![CDATA[Ardo]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Reinvigorating electrochemistry education]]></article-title>
<source><![CDATA[iScience]]></source>
<year>2021</year>
<volume>24</volume>
<page-range>102481</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kousathana]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Demerouti]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Tsaparlis]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Instructional misconceptions in acid-base equilibria: An analysis from a history and philosophy of science perspective]]></article-title>
<source><![CDATA[Science &amp; Education]]></source>
<year>2005</year>
<volume>14</volume>
<page-range>173-93</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Nakhleh]]></surname>
<given-names><![CDATA[M. B.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Why some students don&#8217;t learn chemistry: Chemical misconceptions]]></article-title>
<source><![CDATA[Journal of Chemical Education]]></source>
<year>1992</year>
<volume>69</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>191</page-range></nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Okpala]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Onocha]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Difficult physics topics in Nigerian secondary schools]]></article-title>
<source><![CDATA[Physics Education]]></source>
<year>1988</year>
<volume>23</volume>
<page-range>168-72</page-range></nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Önder]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The effect of conceptual change texts supplemented instruction on students&#8217; achievement in electrochemistry]]></article-title>
<source><![CDATA[International Online Journal of Educational Sciences]]></source>
<year>2017</year>
<volume>9</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>969-75</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Reid]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Shah]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The role of laboratory work in university chemistry]]></article-title>
<source><![CDATA[Chemistry Education Research and Practice]]></source>
<year>2007</year>
<volume>8</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>172-85</page-range></nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sanger]]></surname>
<given-names><![CDATA[M. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Greenbowe]]></surname>
<given-names><![CDATA[T. J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[An analysis of college chemistry textbooks as sources of misconceptions and errors in electrochemistry]]></article-title>
<source><![CDATA[Journal of Chemical Education]]></source>
<year>1999</year>
<volume>76</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>853-60</page-range></nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sirhan]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Learning difficulties in chemistry: An overview]]></article-title>
<source><![CDATA[Journal of Turkish Science Education]]></source>
<year>2007</year>
<volume>4</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>2-20</page-range></nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Taber]]></surname>
<given-names><![CDATA[K. S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Learning at the symbolic level]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Gilbert]]></surname>
<given-names><![CDATA[J. K.]]></given-names>
</name>
<name>
<surname><![CDATA[Treagust]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<source><![CDATA[Multiple representations in chemical education]]></source>
<year>2009</year>
<page-range>75-105</page-range><publisher-loc><![CDATA[Dordrecht ]]></publisher-loc>
<publisher-name><![CDATA[Springer Netherlands]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tümay]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Emergence, learning difficulties, and misconceptions in chemistry undergraduate students&#8217; conceptualizations of acid strength]]></article-title>
<source><![CDATA[Science &amp; Education]]></source>
<year>2016</year>
<volume>25</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>21-46</page-range></nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Turner]]></surname>
<given-names><![CDATA[K. L.]]></given-names>
</name>
<name>
<surname><![CDATA[He]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Marchegiani]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Read]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Blackburn]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Miah]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Leketas]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Around the world in electrochemistry: A review of the electrochemistry curriculum in high schools]]></article-title>
<source><![CDATA[Journal of Solid State Electrochemistry]]></source>
<year>2024</year>
<volume>28</volume>
<page-range>1361-74</page-range></nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wu]]></surname>
<given-names><![CDATA[M.-Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Yezierski]]></surname>
<given-names><![CDATA[E. J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Secondary chemistry teacher learning: Precursors for and mechanisms of pedagogical conceptual change]]></article-title>
<source><![CDATA[Chemistry Education Research and Practice]]></source>
<year>2023</year>
<volume>24</volume>
<page-range>245-62</page-range></nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Zubir]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Darmana]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Damanik]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Nasution]]></surname>
<given-names><![CDATA[H. I.]]></given-names>
</name>
<name>
<surname><![CDATA[Annauli]]></surname>
<given-names><![CDATA[G. O.]]></given-names>
</name>
<name>
<surname><![CDATA[Siregar]]></surname>
<given-names><![CDATA[V. C. R. U.]]></given-names>
</name>
<name>
<surname><![CDATA[Silitonga]]></surname>
<given-names><![CDATA[Y. S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Bleach effectively removes the stubborn stains]]></article-title>
<source><![CDATA[Indonesian Journal of Chemical Science and Technology (IJCST]]></source>
<year>2020</year>
<volume>3</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>20-4</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
