Question

Based on the balanced chemical equation shown below, determine the molarity of a solution containing Fe₂⁺(aq), if 40.00 mL of the Fe₂⁺(aq) solution is required to completely react with 30.00 mL of a 0.125 M potassium bromate, KBrO₃(aq), solution. The chemical equation for the reaction is

6 Fe₂⁺(aq) + BrO₃-(aq) + 6 H+(aq) → 6 Fe₃⁺(aq) + Br-(aq) + 3 H₂O(l).

Answer 1

To determine the molarity of the Fe₂⁺(aq) solution, calculate the moles of Fe₂⁺(aq) and use the stoichiometry of the balanced chemical equation.

Step-by-step explanation:

In order to determine the molarity of a solution containing Fe₂⁺(aq), we need to calculate the number of moles of Fe₂⁺(aq) in the given volume and then divide by the total volume of the solution.

First, we can calculate the moles of Fe₂⁺(aq) using the volume of the solution and its molarity. Molarity is calculated by dividing the moles of solute by the volume of the solution in liters. In this case, we have 40.00 mL of the Fe₂⁺(aq) solution, which is 0.04 L, and the molarity is unknown.

We also need to determine the number of moles of KBrO₃(aq) in the given volume and use the balanced chemical equation to find the stoichiometry ratio between Fe₂⁺(aq) and KBrO₃(aq). With this information, we can calculate the molarity of the Fe₂⁺(aq) solution.