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Chemistry, 22.05.2020 18:03 irene27

Un tecnico di laboratorio deve preparare una soluzione di carbonato di sodio decaidrato, Na2CO3⋅ 10 H2O per eseguire alcune analisi. (Le 10 molecole di acqua rappresentano acqua di cristallizzazione che fanno parte della sostanza.) Il responsabile di laboratorio scrive velocemente su un foglio di carta le seguenti indicazioni: Prepara 250 mL di soluzione 0,0500 M di carbonato di sodio decaidrato, Na2CO3⋅⋅⋅⋅ 10 H2O per pesata, preparane poi 100 mL 0,0250 M per diluizione della prima.

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