Question

The density of 3M solution of sodium chloride is 1.25 gram per mole calculate the molarity of the solution.
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Answer 1

Answer:

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$<font color = "red"><B>Answer:$

$<font color = "red"><B>.°.Molarity = 2.79 m$

$<font color = "orange"><B>Explanation:$

$<font color = "green"><B>Q.The density of 3M solution of sodium chloride is 1.25 gram per mole. Calculate the molarity of the solution.$

$<font color = "blue"><B>Solution: Mass of NaCl in 1L solution = 3 × 58.5 = 175.5 grams.$

$<font color = "blue"><B>Mass of 1L solution = 1000 × 1.25 = 1250 grams.$

$<font color = "blue"><B>Mass of water in solution = 1250 - 75.5 = 1074.5 grams.$

$<font color = "blue"><B>Molarity = 3 mol / 1.0745 kg = 2.79 m$

$<font color = "blue"><B>.°.Molarity = 2.79 m$