A solution contains 5.75 mg of magnesium ions in 332 mL of solution. What is the concentration of the solution in mEq/L?
A)0.712 mEq/L
B)0.473 mEq/L
C)1.42 mEq/L.
D)34.6 mEq/L

Question

Quizplus · Accepted Answer

Firstly, we need to calculate the total number of moles of magnesium ions present in the solution:
(5.75 mg) / (24.305 g/mol) = 0.0002363 mol

Then, we need to convert this to milliequivalents (mEq) of magnesium ions, by multiplying the number of moles by the ion's valence:
0.0002363 mol * 2 = 0.0004726 mEq

Finally, we can calculate the concentration of the solution in mEq/L by dividing the total mEq of magnesium ions by the volume of the solution in liters:
0.0004726 mEq / 0.332 L = 0.00142 mEq/L

Therefore, the answer is C.

A Solution Contains 5