(1)
方程式:
2PbO2 == 2PbO + O2
2 1
ax c
2/ax = 1/c
c = ax/2
4HCl + PbO2 == PbCl2 + Cl2↑ + 2H2O
1 1
a(1-x) e
1/a(1-x) = 1/e
e = a(1-x)
c + e = y
所以ax/2 + a(1-x) = y
y = a - ax/2
(2)
c:e = 5:3
(ax/2):a(1-x) = 5:3
x = 10/13
所以剩余固体中含有的物质为 PbO2 和 PbO
其物质量比为 n(PbO2):n(PbO) = (1 - 10/13):(10/13) = 3:10