Respuesta :
0.72 mol/L
Explanation:
[tex]\textrm{Molarity of a solution}=\frac{\textrm{Number of moles of solvent}}{\textrm{Volume of solution in Liters}}[/tex]
We are given a [tex]2.50L[/tex] solution which contains [tex]135g[/tex] of [tex]KCl[/tex].
To calculate number of moles of [tex]KCl[/tex] present, we need to find it's molar mass from charts. Molar Mass of [tex]KCl[/tex] is known to be [tex]74.55\frac{g}{Mol}[/tex].
Number of moles of [tex]KCl[/tex] present = [tex]\frac{\textrm{Given weight}}{\textrm{Molar Mass}}\textrm{ = }\frac{135g}{74.55\frac{g}{Mol}}\textrm{ = }1.81087mol[/tex]
Molarity = [tex]\frac{1.81087mol}{2.50L}=0.7243\frac{mol}{L}[/tex]
∴ Molarity of given [tex]KCl[/tex] solution = [tex]0.72\frac{mol}{L}[/tex]
