Solubility

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Neon
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Solubility

Post by Neon »

Please help me with this task:

The solubility product of As2S3 📖 is 4.0.10−29 (T = 25 °C).
a) Calculate the number of S2- 📖
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
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ChenBeier
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Re: Solubility

Post by ChenBeier »

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-
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Neon
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Re: Solubility

Post by Neon »

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

Post by ChenBeier »

Here another example


Image
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