An iron ore sample weighing 0.9174 g is dissolved in HCl(aq), and the iron is obtained as Fe2+(aq). This solution is then titrated with 34.62 mL of 5.016×10−2 M K2Cr2O7(aq)6Fe2+ + 14H+ + Cr2O2−7  → 6Fe3+ + 2Cr3+ + 7H2O What is the mass percent Fe in the ore sample?

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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.