Answer:
The molarity is 3.42 [tex]\frac{moles}{liter}[/tex]
Explanation:
The molarity reflects the concentration of a solution and indicates the number of moles of solute per liter of solution. In other words, the molarity (M) is the number of moles of solute that are dissolved in a given volume.
The Molarity of a solution is determined by the following formula:
[tex]Molarity (M)=\frac{number of moles of solute}{volume}[/tex]
Molarity is expressed in units ([tex]\frac{moles}{liter}[/tex]).
To know the amount of moles of solute (NaCl) you must know its molar mass. If:
the molar mass of NaCl is: 23 g/mole + 35.45 g/mole= 58.45 g/mole
Now you apply a rule of three as follows: if 58.45 g of NaCl are present in 1 mole, 10 grams of the compound in how many moles are they?
[tex]moles=\frac{10 g*1 mole}{58.45 g}[/tex]
moles= 0.171
Then:
Replacing in the definition of molarity:
[tex]Molarity=\frac{0.171 moles}{0.05 L}[/tex]
Molarity= 3.42 [tex]\frac{moles}{liter}[/tex]
The molarity is 3.42 [tex]\frac{moles}{liter}[/tex]
