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 , [tex]m=58.44\ g/mol[/tex] .
Now , number of moles is given by :
[tex]n=\dfrac{\text{Given weight}}{\text{Molecular Mass}}\\\\n=\dfrac{7}{58.44}\ mole\\\\n=0.12\ moles[/tex]
Molarity is given by :
[tex]M=\dfrac{\text{Number of moles}}{\text{Volume ( in Liters)}}\\\\M=\dfrac{0.12}{1}\ M\\\\M=0.12\ M[/tex]
Hence , this is the required solution .
