Question

If the concentration of sodium ion in this average individual is 0.131 MM, what is the mass of sodium ion circulating in the blood? Express your answer using two significant figures.

Answer 1

This is an incomplete question, here is a complete question.

The average adult human male has a total blood volume of 5.0 L. If the concentration of sodium ion in this average individual is 0.131 M, what is the mass of sodium ion circulating in the blood?  Express your answer using two significant figures.

Answer : The mass of sodium ion is, $1.5\times 10^1g$

Explanation : Given,

Concentration of $Na^+$ ion = 0.131 M

Volume of solution = 5.0 L

Molar mass of $Na^+$ ion = 23 g/mole

Molarity : It is defined as the number of moles of solute present in one liter of volume of solution.

Formula used :

$\text{Molarity}=\frac{\text{Mass of }Na^+}{\text{Molar mass of }Na^+\times \text{Volume of solution (in L)}}$

Now put all the given values in this formula, we get:

$0.131M=\frac{\text{Mass of }Na^+}{23g/mole\times 5.0L}$

$\text{Mass of }Na^+=15.065g=1.5\times 10^1g$

Therefore, the mass of sodium ion is, $1.5\times 10^1g$