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Determine the concentration in mmol/L for each ion:

- Sodium ion: 130 mEq = 130 mmol/L
- Chloride ion: 109 mEq = 109 mmol/L
- Lactate: 28 mEq = 28 mmol/L
- Potassium ion: 4 mEq = 4 mmol/L
- Calcium ion: 3 mEq = 1.5 mmol/L

Answer :

Final answer:

Milliequivalents (mEq) and millimoles (mmol) are units expressing electrolyte concentration. For ions with a charge of one, 1 mEq equals 1 mmol. But for ions with a charge of two, such as calcium, 1 mEq equals 0.5 mmol.

Explanation:

The question pertains to the conversion between milliequivalents (mEq) and millimoles (mmol/L) in the context of different ions. To help clarify, milliequivalents and millimoles are units used to express the concentration of electrolytes in a solution, such as body fluids.

It's important to understand that for ions with a charge of one (such as sodium, potassium, chloride, and lactate), one milliequivalent is equal to one millimole. This perfectly agrees with the given examples: 130 mEq of sodium ion equaling 130 mmol/L and so on.

However, for ions that have a charge of two, like calcium ion, one milliequivalent is equal to 0.5 millimoles. Hence, 3 mEq of calcium ion becomes 1.5 mmol/L. These conversions are crucial in medical and biochemical contexts, where precise measurement of electrolyte concentrations in body fluids, such as cerebrospinal fluid or urine, is needed.

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