Multiple choice

The average concentration of Na+ in human blood serum is about 4.3 gm/litre. What is molarity of Na+?

  1. 0.19

  2. 4.3

  3. 0.86

  4. 2.3

  5. 0.66
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A Correct answer
Explanation

Molarity of Na+ in human blood serum = (Strength in gm/litre)/(Mol. wt.)
= (Strength in gm/litre)/(Ionic. wt.) = 4.3/23 = 0.19.

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