D.已知常温下:\(\rm{K_{sp}}\)\(\rm{[Mg(OH)}\)\(\rm{{\,\!}_{2}}\)\(\rm{]=5.6×10}\)\(\rm{{\,\!}^{−12}}\),则\(\rm{pH=10}\)的含\(\rm{Mg}\)\(\rm{{\,\!}^{2+}}\)溶液中,\(\rm{c(Mg}\)\(\rm{{\,\!}^{2+}}\)\(\rm{)\leqslant 5.6×10}\)\(\rm{{\,\!}^{−4}}\) \(\rm{mol·L}\)\(\rm{{\,\!}^{−1}}\) |