Chemistry, 20.11.2020 14:00 jabezslade22

Uczniowie pracując w grupach, umieścili na trzech szalkach Petriego po kawałku białego sera. Do pierwszej próbki dodali kilka kropli wody destylowanej, do drugiej – kilka kropli stężonego kwasu azotowego(V), a do trzeciej – zasady sodowej. Wskaż, w której z próbek pojawiło się żółte zabarwienie. a W próbce I i III
b W próbce II i III
c Wyłącznie w próbce I
d Wyłącznie w próbce II
e Wyłącznie w próbce III

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