Mute
Com.Ciência.Gaia
Quando o vinagre (solução aquosa de ácido acético, CH₃COOH) entra em contato com o bicarbonato de sódio (NaHCO₃), ocorre uma reação ácido-base que forma ácido carbônico (H₂CO₃), o qual se decompõe rapidamente em dióxido de carbono (CO₂) e água (H₂O). A reação global pode ser representada por: NaHCO₃ + CH₃COOH → CH₃COONa + H₂O + CO₂(g) O dióxido de carbono liberado não mantém a combustão porque não é um gás comburente. A chama da vela depende da presença de oxigênio (O₂) para que ocorra a reaçã
Follow
22
0
8
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