Electrometric investigations on formation of lanthanum molybdates as a function of Ph
The precise nature of the reaction between lanthanum nitrate and sodium molybdate at specific pH levels 7.6, 5.5 and 4.1 has been studied by means of electrometric techniques involving potentiometric and conductometric titrations, in aqueous and alcoholic media using each reagent as titrant. Well-de...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Química
2004-01-01
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| Series: | Journal of the Brazilian Chemical Society |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532004000200014 |
| _version_ | 1811292383011143680 |
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| author | Prasad Shiva Leite Valderí D. Santana Renato A.C. de Brito Joelma B. |
| author_facet | Prasad Shiva Leite Valderí D. Santana Renato A.C. de Brito Joelma B. |
| author_sort | Prasad Shiva |
| collection | DOAJ |
| description | The precise nature of the reaction between lanthanum nitrate and sodium molybdate at specific pH levels 7.6, 5.5 and 4.1 has been studied by means of electrometric techniques involving potentiometric and conductometric titrations, in aqueous and alcoholic media using each reagent as titrant. Well-defined breaks and inflections in the titration curves provide cogent evidence for formation and precipitation of lanthanum normal-La2O3.3MoO3, para- La2O3.7MoO3 and octa-2 La2O3.24MoO3 molybdates in the vicinity of pH 5.9, 4.8 and 4.2, respectively. Analytical investigations of the precipitates of lanthanum molybdates have also been carried out, which substantiate the results of the electrometric study. |
| first_indexed | 2024-04-13T04:44:39Z |
| format | Article |
| id | doaj.art-dd5d46c4eb7a4f82b37fbfdf04a1c60e |
| institution | Directory Open Access Journal |
| issn | 0103-5053 |
| language | English |
| last_indexed | 2024-04-13T04:44:39Z |
| publishDate | 2004-01-01 |
| publisher | Sociedade Brasileira de Química |
| record_format | Article |
| series | Journal of the Brazilian Chemical Society |
| spelling | doaj.art-dd5d46c4eb7a4f82b37fbfdf04a1c60e2022-12-22T03:01:54ZengSociedade Brasileira de QuímicaJournal of the Brazilian Chemical Society0103-50532004-01-01152246252Electrometric investigations on formation of lanthanum molybdates as a function of PhPrasad ShivaLeite Valderí D.Santana Renato A.C. deBrito Joelma B.The precise nature of the reaction between lanthanum nitrate and sodium molybdate at specific pH levels 7.6, 5.5 and 4.1 has been studied by means of electrometric techniques involving potentiometric and conductometric titrations, in aqueous and alcoholic media using each reagent as titrant. Well-defined breaks and inflections in the titration curves provide cogent evidence for formation and precipitation of lanthanum normal-La2O3.3MoO3, para- La2O3.7MoO3 and octa-2 La2O3.24MoO3 molybdates in the vicinity of pH 5.9, 4.8 and 4.2, respectively. Analytical investigations of the precipitates of lanthanum molybdates have also been carried out, which substantiate the results of the electrometric study.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532004000200014molybdateslanthanum molybdateselectrometry |
| spellingShingle | Prasad Shiva Leite Valderí D. Santana Renato A.C. de Brito Joelma B. Electrometric investigations on formation of lanthanum molybdates as a function of Ph Journal of the Brazilian Chemical Society molybdates lanthanum molybdates electrometry |
| title | Electrometric investigations on formation of lanthanum molybdates as a function of Ph |
| title_full | Electrometric investigations on formation of lanthanum molybdates as a function of Ph |
| title_fullStr | Electrometric investigations on formation of lanthanum molybdates as a function of Ph |
| title_full_unstemmed | Electrometric investigations on formation of lanthanum molybdates as a function of Ph |
| title_short | Electrometric investigations on formation of lanthanum molybdates as a function of Ph |
| title_sort | electrometric investigations on formation of lanthanum molybdates as a function of ph |
| topic | molybdates lanthanum molybdates electrometry |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532004000200014 |
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