[diablo]

Hi,

how to calculate the concentration of H₂S if following
equilibrium constant is given:  H₂S --> 2H⁺ + S^2- = 1x10^-21

if i know [S^2-] then [H₂S] would be :

1x10^-21 / [S^2-]²

or
1x10^-21 / [S^2-] ?

thx diablooo

[Borek]

Only [S^2-] given? No way to solve the question.

Write down Ka equation for H₂S.