State the monohydrate is found as the mineral kieserite

Reference no: EM13161652

Magnesium sulfate can be obtained at a drugstore as Epsom salts. The monohydrate is found as the mineral kieserite (MgSO4 * H2O, 138 g/mol). What would the pH of a 500mL aqueous solution containing 1.62 g dissolved kieserite? The Ka2 value for sulfuric acid is 1.2 x 10^-2. I got the answer 6.85 but the actual answer is 7.15. Please explain coherently.

Reference no: EM13161652

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