Question

30.为测定人呼出的气体中的二氧化碳的含量,将1000 mL(已按标准状况折算)呼出的气

Answer 1

(1)c Ba(OH)2 =36.4*0.1/40=0.091mol/L

(2)n OH-(20ml) =2.04mol

n OH-(50ml反应后) =0.0051mol

n OH-(原)=0.00455mol

n OH-(反应)=0.00055mol

n co2=0.000275mol

vco2=6.61ml

w=0.616%