3Cu2s+2H2O=6Cu+2H2S+SO2
(1),变浅
(2)K=c(H2)*c(I2)/C(HI)平方
(3)氢气浓度为0.5,分解碘化氢为1,0
氨气的浓度乘以剩余碘化氢的浓度为20,所以所求值为4