A 0.89% (w/v) sodium chloride solution is referred to as physiological saline solution because it has the same concentration of

Question

snow_lady

28 days ago

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A 0.89% (w/v) sodium chloride solution is referred to as physiological saline solution because it has the same concentration of

salts as human blood. what is the molarity of a physiological saline solution? (note: w/v means mass to volume)

Chemistry

1 answer:

Tems11 [2.6K] · Answer 1 · 2026-03-11T03:34:03+03:00

1) To express 0.89% m/v, it equals 0.89 grams of NaCl per 100 ml of solution.

This corresponds to 8.9 grams of NaCl in 1000 ml of solution, or 8.9 grams in 1 liter.

2) Molarity is represented as M = moles of solute / liters of solution.

Thus, we need to determine the moles in 8.9 grams of NaCl.

3) The molar mass of NaCl is calculated as 23.0 g/mol + 35.5 g/mol = 58.5 g/mol.

4) Therefore, the number of moles of NaCl calculates as mass / molar mass = 8.9 g / 58.5 g/mol = 0.152 moles.

5) Consequently, M = 0.152 moles of NaCl / 1 liter of solution = 0.152 M.

Answer: 0.152 M