Question

0.5molH2SO4质量是___g,含___个分子,含___mol氧原子,能和___molNaOH完全反应,该硫酸所含

Answer 1

m(H2SO4)=n(H2SO4)*M(H2SO4)=0.5mol*98mol/L=49g

N(H2SO4)=n(H2SO4)*NA=0.5mol*6.02*10^23=3.01*10^23

n(O2)=0.5mol*4=2mol

H2SO4+2NaOH=Na2SO4+H2O

1mol 2mol

0.5mol x

x=1mol

n(H)=0.5mol*2=1mol

n(H3PO4)=1mol/3=0.33mol

由题意得,n(HCL)=1mol

m(HCL)=n(Hcl)*M(Hcl)=1mol*36.5g/mol=36.5g