Question

问一道高一化学题

需要过程 谢谢

Answer 1

Sorry, I think that p''(H2SO4) shouldn't be 13.5, it's should be 1.35gram per Cc.

n(Na2SO4)=c(Na2SO4)*V=0.5mol/L*0.2L=0.1mol
V'=n'(Na2SO4)/c'(Na2SO4)=0.1mol/(0.2mol/L)=0.5L
n(H2SO4)=c(H2SO4)*V=1mol/L*0.2L=0.2mol
n'(H2SO4)=c'(H2SO4)*V'=2mol/L*0.5L=1mol
△n(H2SO4)=n'(H2SO4)-n(H2SO4)=1mol-0.2mol=0.8mol
c''(H2SO4)=1000pw%/M=1000*1.35*55.8%/98=7.7mol/L
△V(H2SO4)=△n(H2SO4)/c''(H2SO4)=0.8mol/(7.7mol/L)=0.1039L=103.9mL

Summary,
△V(H2SO4)=103.9mL
V'=500mL