Normal saline solution used in IVs is usually around 0.90% m/v or 0.154 M ; howe

Question

Normal saline solution used in IVs is usually around 0.90% m/v or 0.154 M; however, other saline solutions may have a higher or lower concentration of sodium chloride, NaCl, depending on the use. For example, a hypertonic saline solution with a concentration greater than 0.154 M may be used to treat hyponatremia (sodium concentration in the serum is too low).

Calculate the molarity of the NaCl solution when 29.2  g of NaCl is dissolved in 100 mL of water.

Express the molarity with the appropriate units.

Explanation / Answer

Ans- Supposing the addition of the NaCl does not change the volume of liquid.

(29.2 g NaCl) / (58.4430 g NaCl/mol) / (0.100 L) = 4.996 mol/L NaCl

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