1、 FeS = Fe(2+) + S(2-)
x x
x*x = 6.05*10^(-18)
x = 2.46*10^(-9) mol/L
FeS溶解的质量溶解度:2.46*10^(-9) * (56+32)/10 = 2.16*10^(-8) g/100gH2O
2、FeS = Fe(2+) + S(2-)
1mol/L y
1*y = 6.05*10^(-18)
[H+]^2 * y = 1.0*10^(-22)
[H+]^2 = 10^(-22)/(6.05*10^(-18)) = 1.65*10^(-5)
[H+] = 4.06*10^(-3)