Calculate the pH of a 0.005 M Na_2 S solution. K_1 and K_2 for H_2S ar – InterviewSolution

1.	Calculate the pH of a 0.005 M Na_2 S solution. K_1 and K_2 for H_2S are 1xx10^(-7) and 1xx 10^(-14)respectively.
Answer» Solution : The first STEP of HYDROLYSIS, i.e., `S^(2-) + H_2O IFF HS + OH^-`is predominant and hence `K_2`value is used in the calculations. 11.70

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