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If Nurse Antonio adds that 7 grams of NaCI to water to make 1 liter of solution, what is the molar concentration of the solution? Use dimensional analysis and show how you completed the unit conversion.

User Yeh
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1 Answer

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Given :

Nurse Antonio adds that 7 grams of NaCI to water to make 1 liter of solution.

To Find :

The molar concentration of the solution .

Solution :

Molecular mass of NaCl ,
m=58.44\ g/mol .

Now , number of moles is given by :


n=\frac{\text{Given weight}}{\text{Molecular Mass}}\\\\n=(7)/(58.44)\ mole\\\\n=0.12\ moles

Molarity is given by :


M=\frac{\text{Number of moles}}{\text{Volume ( in Liters)}}\\\\M=(0.12)/(1)\ M\\\\M=0.12\ M

Hence , this is the required solution .

User Charl Botha
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