高一化学题将等物质的量的A与B混合于2L的密闭容器中,发生反应3A+B=xC+2D,5min后测得c(D)=0.5mol

3个回答

  • 1.3A + B =xC + 2D

    3 1 2

    c(A耗) c(B耗) 0.5mol/L

    c(A耗)=0.75mol/L c(B耗)=0.25mol/L

    则c(A余)+0.75mol/L =5/3c(A余)+0.25mol/L

    c(A余)=0.75mol/L

    2.v(D)=0.5/5=0.1mol/(Lmin)

    v(B)=1/2 v(D)=0.05mol/(Lmin)

    3.v(C)=0.1mol/(L*min)

    v(D):v(C)= 1 则 x=2