A prescription order calls for one-liter solution of NaCl to be made so that it will contain 15

step 1 In one liter of this saline solution, let's determine the number of moles of N8 plus and CL minu

A prescription order calls for one-liter solution of NaCl to...

A prescription order calls for one-liter solution of $\mathrm{NaCl}$ to be made so that it will contain $15 \mathrm{mEq}$ of $\mathrm{Na}^{+}$ion. How many milligrams of $\mathrm{NaCl}$ (molecular weight $=58.5 \mathrm{~g} / \mathrm{mol}$ ) are required?

Key Concepts

Milliequivalents

Milliequivalents (mEq) are a measure of the chemical activity of electrolytes that considers both the amount of substance (in moles) and the valence (charge) of its ions. This concept is essential in medical and chemistry applications where ion concentrations need to be accurately controlled and converted to dosing amounts.

Molecular Weight

Molecular weight, expressed in grams per mole (g/mol), indicates the mass of one mole of a substance. It is a fundamental concept used to convert between the number of moles (or equivalents) and the mass of a compound, forming the basis for many calculations in solution preparation and dosing.

Ionic Dissociation

Ionic dissociation refers to the process by which an ionic compound dissolves in a solvent, breaking into its individual constitutive ions. Recognizing how a compound dissociates helps determine how many ions are contributed by a given mole of the compound, an important factor when calculating dosages based on specific ion requirements.

Dimensional Analysis

Dimensional analysis is a systematic method used to convert units by multiplying with conversion factors so that unwanted units cancel out, leaving the desired unit. This technique is critical in ensuring that all steps in a calculation, such as converting between moles, milliequivalents, and mass, are consistent and accurate.

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