Question

The molarity of $N{a^ + }$, when the average concentration of $N{a^ + }$ in human blood serum is about $3.4g{L^{ - 1}}$ is,
a) $8.4$
b) $2.3$
c) $0.68$
d) $0.15$

Answer 1

We know that concentration is the plenitude of a constituent partitioned by the all out volume of a combination. A few sorts of numerical depiction can be recognized: mass fixation, molar focus, number focus, and volume concentration. A focus can be any sort of substance combination, however most often solutes and solvents in arrangements. The molar (sum) focus has variations like typical fixation and osmotic focus.

Complete answer:
We have to know that sodium assumes a critical part in your body. It keeps up an ordinary pulse, upheld by your nerves and muscles, and controls your body's liquid equilibrium.
A typical blood sodium level is somewhere in the range of $135$ and$\;145$ milliequivalent for every liter ($mEq/L$ ). Hyponatremia happens when the sodium in your blood falls under$135{\text{ }}mEq/L$ .
The molarity of the sodium ion is calculated using the molarity formula.
We know that,
$Molarity = \dfrac{{{\text{Weight of the solution }}}}{{{\text{Molecular weight}}}}$
Now we can substitute the known values we get,
$Molartiy = \dfrac{{3.4g{L^{ - 1}}}}{{21.2}} = 0.15M$

Hence option d is correct.

Additional information:
Plasma osmolarity estimates the body's electrolyte–water balance. There are a few techniques for showing up at this amount through estimation or computation.
Osmolarity and osmolarity are measures that are actually unique, yet practically the equivalent for ordinary use. Though osmolarity is characterized as the quantity of osmoles of solute per kilogram of dissolvable osmolarity is characterized as the quantity of osmoles of solute per liter (L) of arrangement. Accordingly, bigger numbers demonstrate a more noteworthy convergence of solutes in the plasma.

Note:
We also know that in persistent hyponatremia, sodium levels drop progressively more than 48 hours or more — and indications and inconveniences are normally more moderate.
In intense hyponatremia, sodium levels drop quickly — bringing about possibly risky impacts, for example, fast cerebrum expanding, which can bring about a state of extreme lethargy and demise.
Premenopausal ladies have all the earmarks of being at the most serious danger of hyponatremia-related cerebrum harm. This might be identified with the impact of ladies' sex chemicals on the body's capacity to adjust sodium levels.