Question

A sodium intravenous (IV) fluid contains 154mEq of Na+ per liter of solution. if patient receives exactly 470 ml of the IV solution, how many mole of Na+ were given

Answer 1

An equivalent is described as an amount of substance that in an acid base reaction reacts with or supplies 1 mole of H+ ions or in a redox reaction supplies or reacts with 1 mole of electrons.

For Na+, as 1 mole of Na+ reacts with 1 mole of electrons in a redox reaction, one equivalent of Na+ is one mole of Na+.

The patient receives an IV fluid that contains 154 mEq of Na+ per liter of solution, that is 154 x 10^-3 mol/liter

the given volume = 470ml = 0.47L

the number of moles of Na⁺ given =  154 x 10^-3 mol/liter x  0.47L = 0.07238 mol

hence the required answer is 0.072238 mol