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Experimente Efectuate de elevii clasei a-Vll-a C

Experimente Efectuate de elevii clasei a-Vll-a C. I.Reactii chimice de combinare ( Sulf arderea cu floricula ) Experiment: Arderea sulfului : Activitatea independentaa elevilor experimentala .

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Experimente Efectuate de elevii clasei a-Vll-a C

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  1. Experimente Efectuate de elevii clasei a-Vll-a C .

  2. I.Reactiichimice de combinare(Sulfarderea cu floricula) • Experiment: • Ardereasulfului: • Activitateaindependentaaelevilorexperimentala. • Luati o cantitate mica de sulf in lingura de arsiincalziti.Cuceflacaraardesulful?? • Apoi,turnatiapaoxigenata in primul flacon siintroducetirepedelingura cu sulfulaprins,inchizandflaconul cu capacul de carton. • Sulfulardemaiviu in oxigen,decat in aer,cuflacaraalbastrasiformeaza un gazincolor,cumirosintepataor,cunoscut sub numele de dioxid de sulf: • S + O2= SO2 • SulfOxigenDioxid de sulf. • Atentie! • Nu inspiratidioxid de sulfintrucatestedaunatororganisumuli. • Definitie: • Procesulchimicprin care douasaumaimultesubstan-tadiferite se unescpentru a forma o substanta cu proprietatinoi se numestereactie de combinare

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