When 10 mL of an aqueous solution of ions was titrated in the presence of dil. using diphenylamine i — Redox Reactions and Volumetric Analysis Chemistry Question

Question

When 10 mL of an aqueous solution of ions was titrated in the presence of dil. using diphenylamine indicator, 15 mL of 0.02 M solution of was required to get the end point. The molarity of the solution containing ions is . The value of x is __________. (Nearest integer)