Kwai Logo
Kwai User Avatar
Uma gota decide tudo. Parece apenas uma mudança de cor, mas o que você está vendo é um dos momentos mais importantes da Química Analítica: o ponto final de uma titulação. No béquer há uma solução ácida contendo fenolftaleína, um indicador químico que permanece incolor em meio ácido. A cada gota de hidróxido de sódio adicionada, os íons H⁺ do ácido são neutralizados pelos íons OH⁻ da base, formando água. Durante quase todo o processo, a solução continua incolor porque ainda existe excesso de á
13
Komentar
Memut
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