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Exercício de A força dos ácidos e das bases de Brönsted-Lowry
Exercício:
Considere as reações representadas pelas equações seguintes:
a) H2O + HCl H3O+ +} Cl-
b) H2O + NH3 NH + OH-
Classifique o comportamento da água, em cada uma das reações, segundo o conceito ácido-base de Brönsted-Lowry. Justifique.
a) No primeiro ácido a água se comporta como base recebendo elétrons do HCl formando o íon hidrônio H3O. No segundo ácido a água se comporta como ácido doando prótons à amônia formando NH4Cl.
Hic Rhodus, hic salta [hík ro- hík saltá, lat.], zde
je Rhodus, zde skákej (Ezopské bajky); odpověď posluchače vychloubači, který tvrdil, že kdysi na Rhodu vyskočil tak vysoko, jak žádný
člověk nedoskočil.
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