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Question- A solution contains both iron(II) and iron(III) ions. A 50.00 mL sample of the solution is titrated with 35.0 mL of 0.280 M KMnO4,which oxidizes at Fe^2+ to Fe^3+. The permanganate ion is reduced to manganese (II) ion. Another 50.00 mL sample of the solution is treated with zinc, which reduces all the Fe^3+ to Fe^2+. The resulting solution is again titrated with 0.0280 M KnO4; this time 49 mL is required. What are the concentrations of Fe^2+ and Fe^3+ in the (original) solution?
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The boiling point of carbon tetrachloride is 76.8 oC. A given solution contains 7.69 g of a nonvolatile nonelectrolyte in 373 g of CCl4. The solution boils at 78.1 oC. What is the gram molecular mass of the solute?
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A titration of 200.0 mL of 1.00 M H2A was done with 1.10 M NaOH. For the diprotic acid H2A, Ka1 = 2.5 × 10-5, Ka2 = 3.1 × 10-9. Calculate the pH after 600.0 mL of 1.10 M NaOH have been added.
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