论文部分内容阅读
一、实验原理: 根据化学方程式:Zn+H_2SO_4=ZnSO_4+H_2↑可以得出W_(Zn)克Zn与足量H_2SO_4反应置换出几个氢分子,若1mol的锌与H_2SO_4完全反应置换出阿佛加德罗常数N个氢分子。 即:N=M_(Zn)n/W_(Zn) (1) W_(Zn)克的锌置换出氢气的体积为V_(H_2),量筒内收集的H_2是被水蒸气所饱和的,故量筒内的气压P_总是氢气的分压与当时当地温度t℃时
First, the experimental principle: According to the chemical equation: Zn + H2SO_4 = ZnSO_4 + H2 ↑ can be obtained W_ (Zn) grams of Zn react with a sufficient amount of H_2SO_4 to replace several hydrogen molecules, if 1mol of zinc and H_2SO_4 complete reaction to replace Abra Gadro constant N hydrogen molecules. That is: N=M_(Zn)n/W_(Zn) (1) W_(Zn) g of zinc displaces the volume of hydrogen by V_(H_2). The H_2 collected in the measuring cylinder is saturated by water vapor, so the measuring cylinder The gas pressure P_ is always the partial pressure of hydrogen at the local temperature t°C