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(b2) : Décantation et récupération du liqui<strong>de</strong> surnageant<br />

(b3) : Lavage <strong>de</strong> <strong>la</strong> poussière non dissoute restante à l’aci<strong>de</strong> nitrique<br />

(b4) : Ajout <strong>de</strong> solution <strong>de</strong> sou<strong>de</strong><br />

NOT<br />

E : L’ajout <strong>de</strong> <strong>la</strong> sou<strong>de</strong> diminue l’acidité <strong>de</strong> <strong>la</strong> solution.<br />

49

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