8.
铝碳酸镁\(\rm{[AlaMgb⋅(CO_{3})c⋅(OH)d⋅eH_{2}O]}\)用于治疗慢性胃炎\(\rm{.}\)称取\(\rm{3.01g}\)铝碳酸镁样品,溶于\(\rm{50mL2mol⋅L^{-1}}\)的盐酸\(\rm{(}\)过量\(\rm{)}\),收集到气体\(\rm{112mL(}\)标准状况\(\rm{)}\);往所得溶液中加入\(\rm{40mL}\) \(\rm{3mol⋅L^{-1}}\)的\(\rm{NaOH}\)溶液,过滤,将所得沉淀洗涤、干燥、称量得固体\(\rm{1.74g}\);再将滤液稀释到\(\rm{100mL}\),测得溶液中\(\rm{OH^{ˉ}}\)的浓度为\(\rm{0.1mol⋅L^{-1}.}\)由计算可以确定\(\rm{e}\)的值为\(\rm{(}\) \(\rm{)}\)