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(a) The pH of black coffee is 5.0. Calculate the hydrogen ion concentration.(b) The Ksp of barium sulphate is 1.5 × 10-9 . Calculate the solubility of barium sulphate in pure water.Calculate the solubility of barium sulphate in pure water. |
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Answer» (a) -log[H+] = 5 Or log[H+] = -5 ∴ [H+] = antilog(-5) = 10-5 (b) BaSO4(s) ⇌ Ba2+(aq) + SO42-(aq) Ksp = [Ba2+][SO42-] = S2 ∴ S = \(\sqrt{K_{sp}}\) = \(\sqrt{1.5\times10^{-9}}\) = 3.873 x 10-5 |
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