Question

将50ml 0.2mol/L的盐酸与50ml 0.5mol/L的硫酸铝溶液混合,然后向该混合液中加入1mol/L的氢氧化

Answer 1

HCL 0.05*0.2 = 0.01mol

AL2（SO4）3 0.05*0.5 = 0.025mol

NaOH 0.175*1 = 0.175mol

HCL + NaOH = NACL + H2O

1mol 1mol

0.01 x=0.01

6NaOH + AL2（SO4）3 = 2AL(OH)3 + 3Na2SO4

6mol 1mol 2mol

x 0.025mol y

x = 0.15mol y = 0.05mol

NaOH剩余0.175-0.15-0.01 = 0.015mol

NaOH + AL(OH)3 = NaAlO2 + 2H20

1mol 1mol 1mol

0.015 x

x = 0.015mol

剩余沉淀 = 0.05-0.015 = 0.035mol

质量 = 0.035 * 78 = 2.73g