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4. Sodium sulphide (Na2S) is added to pure water at a concentration of 103 M. Using an algebraic solution, determine the pH and the

4. Sodium sulphide (Na2S) is added to pure water at a concentration of 103 M. Using an algebraic solution, determine the pH and the concentrations of all species at equilibrium, taking into account. ionic strength effects. (8 marks) Note: For ionic strength, assume Na+ and S are the dominant ions contributing to it.

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