Respuesta :
ANSWER
The molarity of the solution is 1.3875M
EXPLANATION
The mass of FeCl3 is 27 grams
The volume of the solution is 120mL
Follow the steps below to find the molarity of the solution.
Step 1; Write the formula for calculating the molarity
[tex]\text{ Molarity = }\frac{\text{ moles of solute}}{\text{ volume of solution in liters}}[/tex]Step 2; Find the number of moles of the solute
[tex]\text{ mole }=\frac{\text{ mass}}{\text{ molar mass}}[/tex]Recall, that the molar mass of FeCl3 is 162.2 g/mol
[tex]\begin{gathered} \text{ mole = }\frac{\text{ 27}}{\text{ 162.2}} \\ \text{ mole = 0.1665 mole} \end{gathered}[/tex]Step 3 ; convert the mL to Liters
Recall, that 1mL is equivalent to 0.001L
[tex]\begin{gathered} \text{ 1mL }\rightarrow\text{ 0.001L} \\ \text{ 120mL }\rightarrow\text{ xL} \\ \text{ cross multiply} \\ \text{ 1mL }\times\text{ xL = 120mL }\times\text{ 0.001} \\ x\text{ = }\frac{120\text{ x 0.001}}{1} \\ \text{ x = 0.120L} \end{gathered}[/tex]Therefore, the volume of the solution in liters is 0.120L
Step 4; Find the molarity by using the formula in step 1
[tex]\begin{gathered} \text{ Molarity = }\frac{\text{ 0.1665}}{0.120} \\ \text{ Molarity = 1.3875 M} \end{gathered}[/tex]Therefore, the molarity of the solution is 1.3875M
