Task: Question Answering
Input (English): A 0.217 g sample of HgO (molar mass = 217 g) reacts with excess iodide ions according to the reaction shown above. Titration of the resulting solution requires how many mL of 0.10 M HCl to reach equivalence point?
(A)1.0 mL (B)10 mL (C)20 mL (D)50 mL
Output (English): C