Chemistry Forum

Please help me with this task:

The solubility product of As₂S₃ 📖 is 4.0.10−29 (T = 25 °C).
a) Calculate the number of S^2- 📖
ions in 70.0 L of saturated As₂S₃ 📖 solution at 25 °C.

b) In 70.0 L of Na₂S solution of unknown concentration, a maximum of 0.545 mg of As₂S₃ 📖 can be dissolved at
25 °C. Calculate the mass concentration of the Na₂S solution.

Many thanks in advance

For a compound AnBm its

L =(n+m)sqr(KL/(n^n* m^m))

L = (2+3)sqr(KL/(2^2*3^3) = 5SQR(Kl/4*27)

L = 2cAs 3+ = 3 cS 2-

I'm sorry, but I don't quite understand what you're trying to say. Could you please write a concrete numerical result?

Here another example