Stainless steel is a corrosion resistant alloy composed of nickel, chromium and

Question

Stainless steel is a corrosion resistant alloy composed of nickel, chromium and iron. A lab technician was assigned to determine the mass of chromium in a 2.50 g sample of stainless steel. The sample was first dissolved in acid to convert the chromium metal in the sample into chromium (II) ions. The acidified chromium (II) ions were then titrated with 17.69 mL of 0.125 mol/L perchlorate solution according to the unbalanced equation: ClO4- +Cr2+ --> Cl- + Cr 3+ Calculate the mass of chromium found in the 2.50 g sample of stainless steel.

Explanation / Answer

Mass of chromium =(0.125/1000)*17.69 *52 g = 0.114985 g

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