Reactia chimica este:, un fenomen fizic, un fenomen chimic, o transformare de stare de agregare, Este o reactie de substitutie::, CuO +2HCl = CuCl2 +H2O, Fe + CuSO4 = FeSO4 + Cu, CaCO3 = CaO + CO2 , Este o reactie de combinare:, S + O2 = SO2 , Mg +2 HCl = MgCl2 +H2 , 2HgO = 2Hg + O2, Este o reactie de dubla inlocuire:, 2CuO =2 Cu + O2 , Mg + H2SO4 = MgSO4 + H2 , NaCl + AgNO3 = AgCl + NaNO3, Se recunoaste cu AgNO3:, sulfatii, acidul sulfuric, Nici un raspuns corect, Se recunoaste cu BaCl2:, HCl, H2SO4, HBr, Este corecta ecuatia:, NaCl + H2SO4 = Na2SO4, 2NaCl + H2SO4 = Na2SO4 +2 HCl, NaCl + H2SO4 = Na2SO4 + HCl, Este o reactie de descompunere:, 2CuO =2 Cu + O2, Na2O + H2O = 2NaOH, Mg + H2SO4 = MgSO4 + H2, Reprezinta o etapa in rezovare a problemelor :, scrierea indicilor, stabilirea valentei, determinarea maselor molare, Substanta care mareste viteza de reactie se numeste:, reactant, produs de reactie, catalizator.
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Reactii chimice
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Manuela62dragom
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Chimie
Reacții chimice
Ecuații chimice
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