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i already posted this but need the correct answer which is one of the following multiple choice selections. i need an expert on this Calculate

i already posted this but need the correct answer which is one of the following multiple choice selections. i need an expert on this

Calculate the pH of the following aqueous solution: 0.62MH2S(pKa1=7.00;pKa2=12.89) 10.40 3.60 7.21 6.79

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