用电子守恒找出关系式：
IO3~3I2
Cu2+~0.5I2
Cu(IO3)2~6.5I2~13Na2S2O3
n[Cu(IO3)2]=1/13n(Na2S2O3)=1/13*(0.11*0.0353)mol=0.0003mol
c[Cu(IO3)2]=0.0003mol/0.1L=0.003mol/L
设溶液为1L
m[Cu(IO3)2]=0.003mol*414g/mol=1.242g
m(H2O)=1000g-1.242g=998.758g
s=(1.424g/998.758g)*100g=0.12435g