Reações quimicas
- Fatores que iniciam uma reação
*Natureza dos reagentes
*Energia de ativação
*Choques efetivos
- Evidencias da ocorrência de uma reação.
*Formação de precipitado
*Mudança de cor
*Liberação de gás
- Símbolos usado em equações químicas.
Keka n tem como eu fazer
- Classificação das reações
*Adição ou síntese: A + B -> AB
*Decomposição ou analise: AB -> A + B
*Simples troca ou deslocamento: AB + C -> CB + A
AB + D -> AD + B
Reação de simples troca ou deslocamento.
Deslocamento
AB + C -> CB + A
AB + D -> AD + B
Fila de Reatividade
Para metais
<1a/2a/al/zn/fe…
Para não metais
*Reação na qual ocorre transferencia de elétrons.
Obs.: Toda substancia simples tem nox(Numero de oxidação = numero de ligações reais ou teóricas que um elemento pode fazer) igual a zero.
Toda molécula ou íon – formula tem somatório do nox = zero
Ex.: Cl2 => nox = 0
O2 => nox = 0
Obs.: Toda reação ou síntese ou adição, analise ou decomposição e simples troca ou deslocamento também é de oxirredução.
Oxidação = perda de elétrons = nox aumenta = agente redutor
Redução = ganho de elétrons = nox diminui = agente oxidante.
*Balanceamento de reações:
* 1 NaOH + 1 HCl -> NaCl + H O
2
Coe ficente
Índice
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