What is the concentration of nitrate ions in a 0.125 mol L^-1 Mg(NO₃)₂ solution?

Question

Quizplus · Accepted Answer

The chemical formula for magnesium nitrate is Mg(NO3)2, which indicates that each molecule contains two nitrate ions (NO3-). Therefore, the number of nitrate ions present in the solution is:

0.125 mol Mg(NO3)2 × 2 nitrate ions/mol Mg(NO3)2 = 0.250 mol nitrate ions

Since the question asks for the concentration of nitrate ions, we need to divide the number of moles of nitrate ions by the total volume of the solution. However, the volume of the solution is not provided in the question, so we cannot calculate the exact concentration. Therefore, the best answer choice is D, which simply gives the total number of moles of nitrate ions present in the solution.

What Is the Concentration of Nitrate Ions in a 0