Projekt: Voda
description
Transcript of Projekt: Voda
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Radionica : Ispitivanje pH vodenih otopina iz svakodnevnog života
Kemičari 8.r
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Radionica: Ispitivanje pH vodenih otopina iz svakodnevnog životaCILJ:Kroz pokuse ispitati pH vrijednosti vodenih otopina iz svakodnevnog života
Kemijski pribor : epruvete,čaše,kapaljke,špatule, lijevci,aparatura za filtraciju.......
Kemikalije: indikatori: plavi lakmus papir,crveni lakmus papir,univerzalni indikator,metil oranž,fenolftalein ,različite vodene otopine
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Priprema pribora i kemikalija
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Priprema prirodnog indikatora
crvenog kupusa
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Priprema vodenih otopina
Otop.
• Otopina limunske kiseline• Otopina sode bikarbone
Otop.
• Otopina soka od bazge• Otopina sapuna
Otop.
• Otopina octa• Vodovodna voda
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Priprema vodenih otopina
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Usitnja
vanje
tvrd
og
sapu
na
Početak filtracije
alkoholne otopine crvenog kupusa
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FILTRACIJA
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SITNI PROBLEM NASTANE KADA SE
LAKMUS PAPIR ZAGLAVI
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Dok jedni ispituju pH s metil-
oranžom drugi vrijedno bilježe
opažanja
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Još malo radne
atmosfere
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razmišljanje
rasprava
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Boje indilator papirića i otopina
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Dario i Stipa
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Bruno i Vid
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Luka i Bruno
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Pravilo iz laboratorija
Nakon pokusa pospremiti radno
mjesto
Sara Helena
IvaFranciska
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"Ne miješati kemikalije"
Jedno od pravila u kemiji :
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Nije vrijedilo u ovom slučaju !