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General Chemistry

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Moderate

Molar Concentration of a Solution

CHEM-N1ZRFK

Sodium chloride (90.00 grams) is added to a 1.00-L volumetric flask (Flask A), into which distilled water is added to dissolve the salt. The volume of the solution in Flask A is adjust, by adding more distilled water, to exactly 1.00 L.

To an empty 100.00-mL volumetric flask (Flask B) is added 10.00 mL of the solution from Flask A. Then distilled water is added to bring the total volume of the solution in Flask B to 100.00 mL.

What is the molar concentration of sodium in the form of ${ Na}^{ + }$ in Flask B?

A

0.391 mol/L

B

0.154 mol/L

C

9.00 g/L

D

9.00 mol/L