通过拓展大学化学实验培养学生探索创新能力——以“硫酸铜中铜含量测定(碘量法)”为例

孙瑞卿, 许紫婷, 魏巧华

Developing Students' Exploration and Innovation Ability through Expanding University Chemistry Laboratory: Taking "Determination of Copper Content in Copper Sulfate (Iodometry)" as an Example

Ruiqing Sun, Ziting Xu, Qiaohua Wei

表4 硫酸铜铜含量测定计算表(KSCN在KI之后加入)

${c_{{\rm{CuS}}{{\rm{O}}_{\rm{4}}}}}$/(mol·L?1) 次数 ${c_{{\rm{N}}{{\rm{a}}_{\rm{2}}}{{\rm{S}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}}}$/(mol·L?1) * ${V_{{\rm{KI}}}}$/mL ${V_{{\rm{KSCN}}}}$/mL ${V_{{\rm{N}}{{\rm{a}}_{\rm{2}}}{{\rm{S}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}}}$/mL ${\rho _{{\rm{Cu}}}}$/(g·L?1) ${\rho _{{\rm{Cu}}}}$/(g·L?1) * RAD/% 0.025 1 0.02707 4 2.5 22.70 1.562 1.561 0.06% 2 0.02707 4 2.5 22.67 1.560 3 0.02707 4 2.5 22.70 1.562 0.05 1 0.05276 8 5 23.70 3.179 3.183 0.08% 2 0.05276 8 5 23.75 3.185 3 0.05276 8 5 23.75 3.185 0.1 1 0.1024 8 10 20.20 5.258 5.258 0.00% 2 0.1024 8 10 20.20 5.258 3 0.1024 8 10 20.20 5.258