Analisi chimica qualitativa/6° gruppo

Schema operativo riassuntivo

$\left\|{\begin{matrix}Mg^{2+},NH_{4}^{+}\\K^{+},Na^{+},Li^{+},\end{matrix}}\right.\left\{{\begin{matrix}---------------------------->ric._{_{.}}Mg^{2+},NH_{4}^{+}\\---->\left\|{\begin{matrix}acqua_{_{.}}di_{_{.}}barite\\--->\\Ph=12,\Delta \end{matrix}}\right.\left\{{\begin{matrix}soluzione\left\|{\begin{matrix}H_{2}SO_{4}2N\\------------->ric._{_{.}}Na^{+},K^{+},Li^{+}\\pH=3-4\end{matrix}}\right.\\\\--------------(xxx)Mg(OH)_{2}si_{_{.}}elimina\end{matrix}}\right.\end{matrix}}\right.$