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An unknown metal hypochlorite salt, M(ClO)2, is subjected to analysis by iodometric titration: the salt is dissolved in dilute sulfuric acid, treated with excess aqueous KI,and then titrated with Na2S2O3. The unknown metal ion(M2+) is completely unreactive in the titration. However, all of the hypochlorite ion bonded to the metal reacts completely with Na2S2O3. Iodometric titration of an acidified 0.0499 g sample of M(ClO)2 required 28.42 mL of 0.05521 mol/L Na2S2O3 to reach the equivalence point. What is the identity of metal M?

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